/usr/bin/java -Xmx8000000000 -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/unroll-cond-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:35:32,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:35:32,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:35:32,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:35:32,073 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 [2021-06-12 19:35:32,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:35:32,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:35:32,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:35:32,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:35:32,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:35:32,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:35:32,105 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:35:32,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:35:32,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:35:32,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:35:32,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:35:32,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:35:32,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:35:32,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:35:32,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:35:32,107 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:35:32,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:35:32,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:35:32,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:35:32,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:35:32,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:35:32,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:35:32,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:35:32,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:35:32,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:35:32,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:35:32,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:35:32,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:35:32,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:35:32,108 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:35:32,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:35:32,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:35:32,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:35:32,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:35:32,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:35:32,370 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:35:32,371 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:35:32,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2021-06-12 19:35:32,372 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2021-06-12 19:35:32,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:35:32,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:35:32,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:35:32,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:35:32,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:35:32,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/1) ... [2021-06-12 19:35:32,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/1) ... [2021-06-12 19:35:32,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:35:32,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:35:32,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:35:32,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:35:32,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/1) ... [2021-06-12 19:35:32,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/1) ... [2021-06-12 19:35:32,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/1) ... [2021-06-12 19:35:32,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/1) ... [2021-06-12 19:35:32,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/1) ... [2021-06-12 19:35:32,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/1) ... [2021-06-12 19:35:32,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/1) ... [2021-06-12 19:35:32,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:35:32,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:35:32,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:35:32,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:35:32,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (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 [2021-06-12 19:35:32,534 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:35:32,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:35:32,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:35:32,535 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:35:32,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:35:32,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:35:32,535 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:35:32,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:35:32,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:35:32,535 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:35:32,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:35:32,719 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-12 19:35:32,719 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 19:35:32,721 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:35:32 BoogieIcfgContainer [2021-06-12 19:35:32,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:35:32,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:35:32,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:35:32,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:35:32,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:35:32" (1/2) ... [2021-06-12 19:35:32,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c317044 and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:35:32, skipping insertion in model container [2021-06-12 19:35:32,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:35:32" (2/2) ... [2021-06-12 19:35:32,725 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2021-06-12 19:35:32,729 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:35:32,729 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:35:32,729 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:35:32,730 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:35:32,777 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 19:35:32,790 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 19:35:32,803 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:35:32,803 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:35:32,803 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:35:32,803 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:35:32,803 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:35:32,803 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:35:32,804 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:35:32,804 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:35:32,809 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-12 19:35:32,815 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) 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) [2021-06-12 19:35:32,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) 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) [2021-06-12 19:35:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 19:35:32,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:32,821 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:32,821 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash -163389209, now seen corresponding path program 1 times [2021-06-12 19:35:32,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:32,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653473570] [2021-06-12 19:35:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:32,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:32,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653473570] [2021-06-12 19:35:32,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653473570] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:35:32,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:35:32,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:35:32,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517946340] [2021-06-12 19:35:32,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:35:32,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:33,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:35:33,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:35:33,008 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) 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) Second operand has 5 states, 5 states have (on average 2.0) 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) [2021-06-12 19:35:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:33,045 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-06-12 19:35:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:35:33,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 [2021-06-12 19:35:33,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:33,052 INFO L225 Difference]: With dead ends: 26 [2021-06-12 19:35:33,052 INFO L226 Difference]: Without dead ends: 18 [2021-06-12 19:35:33,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:35:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-12 19:35:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-12 19:35:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-06-12 19:35:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-06-12 19:35:33,070 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-06-12 19:35:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:33,071 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-06-12 19:35:33,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) 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) [2021-06-12 19:35:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-06-12 19:35:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 19:35:33,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:33,071 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:33,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:35:33,072 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash 580194151, now seen corresponding path program 2 times [2021-06-12 19:35:33,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:33,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533696181] [2021-06-12 19:35:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:33,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:33,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533696181] [2021-06-12 19:35:33,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533696181] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:35:33,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:35:33,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:35:33,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704199626] [2021-06-12 19:35:33,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:35:33,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:33,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:35:33,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:35:33,116 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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) [2021-06-12 19:35:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:33,137 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-12 19:35:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:35:33,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 [2021-06-12 19:35:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:33,138 INFO L225 Difference]: With dead ends: 28 [2021-06-12 19:35:33,138 INFO L226 Difference]: Without dead ends: 23 [2021-06-12 19:35:33,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:35:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-06-12 19:35:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-06-12 19:35:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-12 19:35:33,141 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-12 19:35:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:33,142 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-12 19:35:33,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) 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) [2021-06-12 19:35:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-12 19:35:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:35:33,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:33,142 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:33,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:35:33,142 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:33,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:33,143 INFO L82 PathProgramCache]: Analyzing trace with hash -824603045, now seen corresponding path program 1 times [2021-06-12 19:35:33,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:33,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040930998] [2021-06-12 19:35:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:33,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:33,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040930998] [2021-06-12 19:35:33,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040930998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:33,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967234678] [2021-06-12 19:35:33,239 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 [2021-06-12 19:35:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:33,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:35:33,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:33,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 19:35:33,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:33,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:33,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:33,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 19:35:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:33,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967234678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:33,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:33,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:35:33,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686003717] [2021-06-12 19:35:33,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:35:33,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:35:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:35:33,497 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-06-12 19:35:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:33,562 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-06-12 19:35:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:35:33,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2021-06-12 19:35:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:33,564 INFO L225 Difference]: With dead ends: 30 [2021-06-12 19:35:33,564 INFO L226 Difference]: Without dead ends: 22 [2021-06-12 19:35:33,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:35:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-06-12 19:35:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-06-12 19:35:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-12 19:35:33,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-12 19:35:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:33,572 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-12 19:35:33,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-06-12 19:35:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-12 19:35:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:35:33,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:33,572 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:33,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 19:35:33,791 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash -81019685, now seen corresponding path program 2 times [2021-06-12 19:35:33,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:33,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810507981] [2021-06-12 19:35:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:33,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:33,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810507981] [2021-06-12 19:35:33,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810507981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:33,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576258358] [2021-06-12 19:35:33,848 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 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 [2021-06-12 19:35:33,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:33,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:33,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:35:33,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:33,932 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 11 treesize of output 7 [2021-06-12 19:35:33,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:33,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:33,940 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-12 19:35:33,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:35:33,974 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-06-12 19:35:33,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:33,976 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-12 19:35:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:34,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576258358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:34,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:34,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:35:34,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040632798] [2021-06-12 19:35:34,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:35:34,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:34,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:35:34,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:35:34,026 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-06-12 19:35:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:34,084 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-06-12 19:35:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:35:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2021-06-12 19:35:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:34,086 INFO L225 Difference]: With dead ends: 35 [2021-06-12 19:35:34,086 INFO L226 Difference]: Without dead ends: 30 [2021-06-12 19:35:34,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:35:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-12 19:35:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-06-12 19:35:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-12 19:35:34,091 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-12 19:35:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:34,091 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-12 19:35:34,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-06-12 19:35:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-12 19:35:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:35:34,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:34,092 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:34,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:34,308 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 770124447, now seen corresponding path program 3 times [2021-06-12 19:35:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:34,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134604304] [2021-06-12 19:35:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:34,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:34,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134604304] [2021-06-12 19:35:34,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134604304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:34,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552593553] [2021-06-12 19:35:34,358 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 [2021-06-12 19:35:34,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:35:34,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:35:34,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:34,493 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 11 treesize of output 7 [2021-06-12 19:35:34,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:34,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:34,500 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-12 19:35:34,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:35:34,539 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-06-12 19:35:34,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:34,540 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-12 19:35:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:34,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552593553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:34,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:34,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:35:34,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947330619] [2021-06-12 19:35:34,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:35:34,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:34,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:35:34,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:35:34,579 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-06-12 19:35:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:34,719 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-06-12 19:35:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:35:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 11 [2021-06-12 19:35:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:34,723 INFO L225 Difference]: With dead ends: 51 [2021-06-12 19:35:34,723 INFO L226 Difference]: Without dead ends: 41 [2021-06-12 19:35:34,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:35:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-12 19:35:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-06-12 19:35:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-12 19:35:34,733 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-06-12 19:35:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:34,733 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-12 19:35:34,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-06-12 19:35:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-12 19:35:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:35:34,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:34,735 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:34,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:34,949 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash 108860664, now seen corresponding path program 1 times [2021-06-12 19:35:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:34,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920201888] [2021-06-12 19:35:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:34,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920201888] [2021-06-12 19:35:34,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920201888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:35:34,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:35:34,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:35:34,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287971700] [2021-06-12 19:35:34,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:35:34,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:34,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:35:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:35:34,979 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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) [2021-06-12 19:35:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:34,991 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-06-12 19:35:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:35:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 [2021-06-12 19:35:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:34,991 INFO L225 Difference]: With dead ends: 29 [2021-06-12 19:35:34,992 INFO L226 Difference]: Without dead ends: 29 [2021-06-12 19:35:34,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:35:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-12 19:35:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-06-12 19:35:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-06-12 19:35:34,994 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-06-12 19:35:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:34,994 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-06-12 19:35:34,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) 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) [2021-06-12 19:35:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-06-12 19:35:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:35:34,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:34,994 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:34,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 19:35:34,994 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash 152604519, now seen corresponding path program 4 times [2021-06-12 19:35:34,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:34,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374667489] [2021-06-12 19:35:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:35,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:35,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374667489] [2021-06-12 19:35:35,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374667489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:35,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105661757] [2021-06-12 19:35:35,034 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 [2021-06-12 19:35:35,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:35:35,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:35,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:35:35,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:35,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:35,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-12 19:35:35,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:35,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:35,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:35,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-12 19:35:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:35,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105661757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:35,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:35,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:35:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454467085] [2021-06-12 19:35:35,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:35:35,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:35,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:35:35,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:35:35,155 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:35:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:35,201 INFO L93 Difference]: Finished difference Result 39 states and 72 transitions. [2021-06-12 19:35:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:35:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 12 [2021-06-12 19:35:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:35,202 INFO L225 Difference]: With dead ends: 39 [2021-06-12 19:35:35,202 INFO L226 Difference]: Without dead ends: 34 [2021-06-12 19:35:35,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:35:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-06-12 19:35:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-06-12 19:35:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) [2021-06-12 19:35:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-06-12 19:35:35,204 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-06-12 19:35:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:35,205 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-06-12 19:35:35,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:35:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-06-12 19:35:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:35:35,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:35,206 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:35,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:35,419 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1747332011, now seen corresponding path program 5 times [2021-06-12 19:35:35,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:35,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979296835] [2021-06-12 19:35:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:35,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:35,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979296835] [2021-06-12 19:35:35,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979296835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:35,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705155929] [2021-06-12 19:35:35,497 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 [2021-06-12 19:35:35,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:35,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:35:35,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:35,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:35,637 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-12 19:35:35,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:35,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:35,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:35,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-12 19:35:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:35,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705155929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:35,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:35,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 19:35:35,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676119598] [2021-06-12 19:35:35,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:35:35,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:35:35,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:35:35,649 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:35:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:35,700 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-06-12 19:35:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:35:35,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 12 [2021-06-12 19:35:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:35,700 INFO L225 Difference]: With dead ends: 50 [2021-06-12 19:35:35,700 INFO L226 Difference]: Without dead ends: 45 [2021-06-12 19:35:35,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:35:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-12 19:35:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-06-12 19:35:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) [2021-06-12 19:35:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-06-12 19:35:35,706 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-06-12 19:35:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:35,706 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-06-12 19:35:35,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:35:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-06-12 19:35:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:35:35,707 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:35,707 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:35,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 19:35:35,921 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1086068228, now seen corresponding path program 1 times [2021-06-12 19:35:35,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:35,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847332442] [2021-06-12 19:35:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:35,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:35,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847332442] [2021-06-12 19:35:35,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847332442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:35,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663513118] [2021-06-12 19:35:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 19:35:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:35,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 19:35:35,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:35,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663513118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:35,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:35,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-12 19:35:35,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086208241] [2021-06-12 19:35:35,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:35:35,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:35:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:35:35,990 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:36,020 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-06-12 19:35:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:35:36,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:35:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:36,021 INFO L225 Difference]: With dead ends: 58 [2021-06-12 19:35:36,021 INFO L226 Difference]: Without dead ends: 58 [2021-06-12 19:35:36,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:35:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-12 19:35:36,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-06-12 19:35:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 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) [2021-06-12 19:35:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2021-06-12 19:35:36,023 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 12 [2021-06-12 19:35:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:36,023 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2021-06-12 19:35:36,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:36,023 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2021-06-12 19:35:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:35:36,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:36,023 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:36,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:36,224 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:36,226 INFO L82 PathProgramCache]: Analyzing trace with hash -974791574, now seen corresponding path program 2 times [2021-06-12 19:35:36,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:36,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923863070] [2021-06-12 19:35:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:36,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:36,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923863070] [2021-06-12 19:35:36,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923863070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:36,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758089783] [2021-06-12 19:35:36,374 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 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 [2021-06-12 19:35:36,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:36,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 19:35:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:36,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758089783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:36,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:36,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-12 19:35:36,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820749358] [2021-06-12 19:35:36,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:35:36,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:36,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:35:36,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:35:36,478 INFO L87 Difference]: Start difference. First operand 33 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:36,526 INFO L93 Difference]: Finished difference Result 44 states and 85 transitions. [2021-06-12 19:35:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:35:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:35:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:36,527 INFO L225 Difference]: With dead ends: 44 [2021-06-12 19:35:36,527 INFO L226 Difference]: Without dead ends: 44 [2021-06-12 19:35:36,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:35:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-12 19:35:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-06-12 19:35:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 70 transitions. [2021-06-12 19:35:36,538 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 70 transitions. Word has length 12 [2021-06-12 19:35:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:36,539 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 70 transitions. [2021-06-12 19:35:36,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 70 transitions. [2021-06-12 19:35:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:35:36,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:36,539 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:36,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:36,740 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:36,740 INFO L82 PathProgramCache]: Analyzing trace with hash 381267931, now seen corresponding path program 6 times [2021-06-12 19:35:36,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:36,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538283582] [2021-06-12 19:35:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:36,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:36,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538283582] [2021-06-12 19:35:36,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538283582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:36,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513031103] [2021-06-12 19:35:36,764 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 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 [2021-06-12 19:35:36,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:35:36,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:36,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:35:36,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:36,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513031103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:36,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:36,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:35:36,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371802547] [2021-06-12 19:35:36,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:35:36,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:36,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:35:36,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:35:36,813 INFO L87 Difference]: Start difference. First operand 35 states and 70 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:36,841 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2021-06-12 19:35:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:35:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-12 19:35:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:36,841 INFO L225 Difference]: With dead ends: 67 [2021-06-12 19:35:36,841 INFO L226 Difference]: Without dead ends: 67 [2021-06-12 19:35:36,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:35:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-12 19:35:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2021-06-12 19:35:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2021-06-12 19:35:36,843 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 13 [2021-06-12 19:35:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:36,844 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2021-06-12 19:35:36,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2021-06-12 19:35:36,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:35:36,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:36,844 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:37,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 19:35:37,064 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:37,065 INFO L82 PathProgramCache]: Analyzing trace with hash 462398216, now seen corresponding path program 3 times [2021-06-12 19:35:37,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:37,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061408442] [2021-06-12 19:35:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:37,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:37,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061408442] [2021-06-12 19:35:37,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061408442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:37,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345823511] [2021-06-12 19:35:37,087 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:35:37,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:35:37,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:37,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:35:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345823511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:37,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:37,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:35:37,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967356137] [2021-06-12 19:35:37,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:35:37,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:37,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:35:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:35:37,152 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:37,211 INFO L93 Difference]: Finished difference Result 80 states and 140 transitions. [2021-06-12 19:35:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:35:37,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-12 19:35:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:37,211 INFO L225 Difference]: With dead ends: 80 [2021-06-12 19:35:37,211 INFO L226 Difference]: Without dead ends: 77 [2021-06-12 19:35:37,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:35:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-12 19:35:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2021-06-12 19:35:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 85 transitions. [2021-06-12 19:35:37,214 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 85 transitions. Word has length 13 [2021-06-12 19:35:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:37,214 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 85 transitions. [2021-06-12 19:35:37,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 85 transitions. [2021-06-12 19:35:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:35:37,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:37,214 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:37,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:37,433 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:37,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1975995423, now seen corresponding path program 7 times [2021-06-12 19:35:37,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:37,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639342053] [2021-06-12 19:35:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:37,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:37,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639342053] [2021-06-12 19:35:37,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639342053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:37,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360156137] [2021-06-12 19:35:37,459 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 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 [2021-06-12 19:35:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:37,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:35:37,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:37,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360156137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:37,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:37,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:35:37,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28468592] [2021-06-12 19:35:37,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:35:37,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:37,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:35:37,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:35:37,503 INFO L87 Difference]: Start difference. First operand 40 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:37,552 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-06-12 19:35:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:35:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-12 19:35:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:37,552 INFO L225 Difference]: With dead ends: 51 [2021-06-12 19:35:37,552 INFO L226 Difference]: Without dead ends: 49 [2021-06-12 19:35:37,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:35:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-12 19:35:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-06-12 19:35:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 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) [2021-06-12 19:35:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2021-06-12 19:35:37,562 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 13 [2021-06-12 19:35:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:37,563 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2021-06-12 19:35:37,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2021-06-12 19:35:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:35:37,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:37,566 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:37,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:37,777 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1314731640, now seen corresponding path program 4 times [2021-06-12 19:35:37,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:37,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395994802] [2021-06-12 19:35:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:37,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:37,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395994802] [2021-06-12 19:35:37,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395994802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:37,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833593430] [2021-06-12 19:35:37,807 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 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 [2021-06-12 19:35:37,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:35:37,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:37,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:35:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:37,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833593430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:37,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:37,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:35:37,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105786769] [2021-06-12 19:35:37,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:35:37,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:37,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:35:37,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:35:37,868 INFO L87 Difference]: Start difference. First operand 40 states and 84 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:37,904 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-06-12 19:35:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:35:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-12 19:35:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:37,905 INFO L225 Difference]: With dead ends: 68 [2021-06-12 19:35:37,905 INFO L226 Difference]: Without dead ends: 68 [2021-06-12 19:35:37,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:35:37,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-12 19:35:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2021-06-12 19:35:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2021-06-12 19:35:37,907 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 13 [2021-06-12 19:35:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:37,907 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2021-06-12 19:35:37,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2021-06-12 19:35:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:35:37,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:37,908 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:38,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 19:35:38,121 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:38,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:38,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1703307557, now seen corresponding path program 8 times [2021-06-12 19:35:38,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:38,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746233113] [2021-06-12 19:35:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:38,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:38,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746233113] [2021-06-12 19:35:38,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746233113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:38,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888928056] [2021-06-12 19:35:38,152 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 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 [2021-06-12 19:35:38,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:38,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:35:38,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:38,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888928056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:38,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:38,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:35:38,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408725973] [2021-06-12 19:35:38,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:35:38,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:38,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:35:38,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:35:38,203 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:38,239 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-06-12 19:35:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:35:38,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-12 19:35:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:38,240 INFO L225 Difference]: With dead ends: 51 [2021-06-12 19:35:38,240 INFO L226 Difference]: Without dead ends: 47 [2021-06-12 19:35:38,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:35:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-12 19:35:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-12 19:35:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-06-12 19:35:38,243 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-06-12 19:35:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:38,243 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-06-12 19:35:38,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-06-12 19:35:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:35:38,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:38,243 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:38,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 19:35:38,449 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash -746128162, now seen corresponding path program 5 times [2021-06-12 19:35:38,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:38,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172199436] [2021-06-12 19:35:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:38,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172199436] [2021-06-12 19:35:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172199436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466129770] [2021-06-12 19:35:38,476 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 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 [2021-06-12 19:35:38,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:38,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:38,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:35:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:38,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466129770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:38,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:38,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:35:38,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515124946] [2021-06-12 19:35:38,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:35:38,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:38,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:35:38,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:35:38,523 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:38,610 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-06-12 19:35:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:35:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-12 19:35:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:38,611 INFO L225 Difference]: With dead ends: 61 [2021-06-12 19:35:38,611 INFO L226 Difference]: Without dead ends: 61 [2021-06-12 19:35:38,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:35:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-12 19:35:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-06-12 19:35:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-06-12 19:35:38,612 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-06-12 19:35:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:38,612 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-06-12 19:35:38,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-06-12 19:35:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:35:38,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:38,613 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:38,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 19:35:38,817 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:38,817 INFO L82 PathProgramCache]: Analyzing trace with hash 202417055, now seen corresponding path program 9 times [2021-06-12 19:35:38,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:38,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89855774] [2021-06-12 19:35:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:38,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:38,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89855774] [2021-06-12 19:35:38,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89855774] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:35:38,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:35:38,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:35:38,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963523543] [2021-06-12 19:35:38,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:35:38,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:35:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:35:38,847 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2021-06-12 19:35:38,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:38,860 INFO L93 Difference]: Finished difference Result 42 states and 79 transitions. [2021-06-12 19:35:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:35:38,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 [2021-06-12 19:35:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:38,860 INFO L225 Difference]: With dead ends: 42 [2021-06-12 19:35:38,861 INFO L226 Difference]: Without dead ends: 36 [2021-06-12 19:35:38,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:35:38,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-12 19:35:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-12 19:35:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 71 transitions. [2021-06-12 19:35:38,862 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 71 transitions. Word has length 13 [2021-06-12 19:35:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:38,862 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 71 transitions. [2021-06-12 19:35:38,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2021-06-12 19:35:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 71 transitions. [2021-06-12 19:35:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:35:38,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:38,862 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:38,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-12 19:35:38,862 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:38,863 INFO L82 PathProgramCache]: Analyzing trace with hash -208272584, now seen corresponding path program 6 times [2021-06-12 19:35:38,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:38,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753464278] [2021-06-12 19:35:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:38,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:38,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753464278] [2021-06-12 19:35:38,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753464278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:38,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476976577] [2021-06-12 19:35:38,886 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:35:38,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:35:38,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:35:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:38,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476976577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:38,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:38,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:35:38,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010531966] [2021-06-12 19:35:38,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:35:38,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:38,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:35:38,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:35:38,958 INFO L87 Difference]: Start difference. First operand 36 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:39,012 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2021-06-12 19:35:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:35:39,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-12 19:35:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:39,012 INFO L225 Difference]: With dead ends: 61 [2021-06-12 19:35:39,012 INFO L226 Difference]: Without dead ends: 61 [2021-06-12 19:35:39,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:35:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-12 19:35:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-06-12 19:35:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 83 transitions. [2021-06-12 19:35:39,014 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 83 transitions. Word has length 13 [2021-06-12 19:35:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:39,014 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 83 transitions. [2021-06-12 19:35:39,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-06-12 19:35:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 83 transitions. [2021-06-12 19:35:39,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:39,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:39,014 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:39,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:39,229 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:39,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1038970604, now seen corresponding path program 7 times [2021-06-12 19:35:39,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:39,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278130358] [2021-06-12 19:35:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:39,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:39,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278130358] [2021-06-12 19:35:39,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278130358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:39,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101782028] [2021-06-12 19:35:39,294 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 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 [2021-06-12 19:35:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:39,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:39,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:39,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:39,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:39,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:39,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:39,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 19:35:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:39,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101782028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:39,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:39,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:39,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566388896] [2021-06-12 19:35:39,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:39,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:39,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:39,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:39,497 INFO L87 Difference]: Start difference. First operand 41 states and 83 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:39,614 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2021-06-12 19:35:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:35:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:39,614 INFO L225 Difference]: With dead ends: 56 [2021-06-12 19:35:39,614 INFO L226 Difference]: Without dead ends: 46 [2021-06-12 19:35:39,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-06-12 19:35:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-06-12 19:35:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 87 transitions. [2021-06-12 19:35:39,616 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 87 transitions. Word has length 14 [2021-06-12 19:35:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:39,616 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 87 transitions. [2021-06-12 19:35:39,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 87 transitions. [2021-06-12 19:35:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:39,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:39,616 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:39,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 19:35:39,832 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:39,832 INFO L82 PathProgramCache]: Analyzing trace with hash -186637180, now seen corresponding path program 8 times [2021-06-12 19:35:39,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:39,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405930423] [2021-06-12 19:35:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:39,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:39,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405930423] [2021-06-12 19:35:39,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405930423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:39,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591134960] [2021-06-12 19:35:39,897 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 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 [2021-06-12 19:35:39,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:39,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:39,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:39,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:40,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:40,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:40,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:40,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:40,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:40,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 19:35:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:40,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591134960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:40,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:40,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:40,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869078256] [2021-06-12 19:35:40,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:40,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:40,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:40,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:40,068 INFO L87 Difference]: Start difference. First operand 43 states and 87 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:40,242 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2021-06-12 19:35:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:35:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:40,243 INFO L225 Difference]: With dead ends: 70 [2021-06-12 19:35:40,243 INFO L226 Difference]: Without dead ends: 56 [2021-06-12 19:35:40,243 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:35:40,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-12 19:35:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-06-12 19:35:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 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) [2021-06-12 19:35:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-06-12 19:35:40,245 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-06-12 19:35:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:40,245 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-06-12 19:35:40,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-06-12 19:35:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:40,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:40,245 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:40,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:40,449 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash 556946180, now seen corresponding path program 9 times [2021-06-12 19:35:40,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:40,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808442591] [2021-06-12 19:35:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:40,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:40,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808442591] [2021-06-12 19:35:40,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808442591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:40,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009841010] [2021-06-12 19:35:40,513 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 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 [2021-06-12 19:35:40,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:35:40,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:40,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:40,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:40,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:40,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:40,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:40,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:40,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:40,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:40,728 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:40,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:40,729 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:40,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009841010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:40,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:40,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:40,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160994148] [2021-06-12 19:35:40,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:40,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:40,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:40,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:40,770 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:40,939 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-06-12 19:35:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:35:40,939 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:40,940 INFO L225 Difference]: With dead ends: 88 [2021-06-12 19:35:40,940 INFO L226 Difference]: Without dead ends: 78 [2021-06-12 19:35:40,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-12 19:35:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-06-12 19:35:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 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) [2021-06-12 19:35:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-06-12 19:35:40,942 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-06-12 19:35:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:40,942 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-06-12 19:35:40,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-06-12 19:35:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:40,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:40,942 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:41,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:41,161 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2047470314, now seen corresponding path program 10 times [2021-06-12 19:35:41,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:41,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715612674] [2021-06-12 19:35:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:41,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:41,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715612674] [2021-06-12 19:35:41,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715612674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:41,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558656508] [2021-06-12 19:35:41,291 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 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 [2021-06-12 19:35:41,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:35:41,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:41,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:41,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:41,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:41,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:41,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:41,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:41,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:41,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 19:35:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:41,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558656508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:41,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:41,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:41,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991157092] [2021-06-12 19:35:41,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:41,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:41,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:41,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:41,547 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:41,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:41,692 INFO L93 Difference]: Finished difference Result 76 states and 163 transitions. [2021-06-12 19:35:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:35:41,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:41,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:41,693 INFO L225 Difference]: With dead ends: 76 [2021-06-12 19:35:41,693 INFO L226 Difference]: Without dead ends: 62 [2021-06-12 19:35:41,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:35:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-12 19:35:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-06-12 19:35:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-06-12 19:35:41,694 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 14 [2021-06-12 19:35:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:41,695 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-06-12 19:35:41,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-06-12 19:35:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:41,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:41,695 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:41,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 19:35:41,905 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1503913622, now seen corresponding path program 11 times [2021-06-12 19:35:41,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:41,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96362380] [2021-06-12 19:35:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:41,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:41,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96362380] [2021-06-12 19:35:41,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96362380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:41,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965735727] [2021-06-12 19:35:41,962 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 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 [2021-06-12 19:35:41,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:35:41,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:41,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:42,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:42,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:42,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:42,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:42,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:42,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:42,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:42,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:42,177 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:42,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:42,177 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:42,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965735727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:42,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:42,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:42,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590670593] [2021-06-12 19:35:42,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:42,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:42,204 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:42,393 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2021-06-12 19:35:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:35:42,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:42,394 INFO L225 Difference]: With dead ends: 101 [2021-06-12 19:35:42,394 INFO L226 Difference]: Without dead ends: 84 [2021-06-12 19:35:42,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:35:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-12 19:35:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-06-12 19:35:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-06-12 19:35:42,396 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-06-12 19:35:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:42,396 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-06-12 19:35:42,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-06-12 19:35:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:42,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:42,396 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:42,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 19:35:42,605 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash -652769490, now seen corresponding path program 12 times [2021-06-12 19:35:42,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:42,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355949846] [2021-06-12 19:35:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:42,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:42,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355949846] [2021-06-12 19:35:42,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355949846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:42,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254626611] [2021-06-12 19:35:42,657 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 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 [2021-06-12 19:35:42,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:35:42,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:42,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:42,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:42,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:42,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:42,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:42,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:42,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:42,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:42,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:42,863 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:42,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:42,864 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:42,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254626611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:42,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:42,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:42,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273881877] [2021-06-12 19:35:42,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:42,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:42,884 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:43,049 INFO L93 Difference]: Finished difference Result 80 states and 179 transitions. [2021-06-12 19:35:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:35:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:43,050 INFO L225 Difference]: With dead ends: 80 [2021-06-12 19:35:43,050 INFO L226 Difference]: Without dead ends: 75 [2021-06-12 19:35:43,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:35:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-12 19:35:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-12 19:35:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-06-12 19:35:43,052 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-06-12 19:35:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:43,052 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-06-12 19:35:43,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-06-12 19:35:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:43,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:43,052 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:43,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-12 19:35:43,269 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1709641404, now seen corresponding path program 13 times [2021-06-12 19:35:43,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:43,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704194824] [2021-06-12 19:35:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:43,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:43,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704194824] [2021-06-12 19:35:43,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704194824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:43,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765122051] [2021-06-12 19:35:43,315 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 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 [2021-06-12 19:35:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:43,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:43,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:43,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:43,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:43,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:43,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:43,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-12 19:35:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:43,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765122051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:43,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:43,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:43,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323051463] [2021-06-12 19:35:43,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:43,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:43,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:43,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:43,499 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:43,636 INFO L93 Difference]: Finished difference Result 81 states and 183 transitions. [2021-06-12 19:35:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:35:43,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:43,640 INFO L225 Difference]: With dead ends: 81 [2021-06-12 19:35:43,640 INFO L226 Difference]: Without dead ends: 67 [2021-06-12 19:35:43,640 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:35:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-12 19:35:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-06-12 19:35:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:43,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-12 19:35:43,642 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-12 19:35:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:43,642 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-12 19:35:43,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-12 19:35:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:43,643 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:43,643 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:43,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:43,853 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:43,853 INFO L82 PathProgramCache]: Analyzing trace with hash -966058044, now seen corresponding path program 14 times [2021-06-12 19:35:43,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:43,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208408982] [2021-06-12 19:35:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:43,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:43,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208408982] [2021-06-12 19:35:43,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208408982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:43,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373580936] [2021-06-12 19:35:43,897 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:35:43,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:43,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:43,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:44,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:44,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:44,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:44,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:44,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:44,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:44,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:44,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:44,084 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:44,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:44,084 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:44,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373580936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:44,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:44,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:44,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720084041] [2021-06-12 19:35:44,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:44,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:44,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:44,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:44,115 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:44,355 INFO L93 Difference]: Finished difference Result 102 states and 228 transitions. [2021-06-12 19:35:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:35:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:44,356 INFO L225 Difference]: With dead ends: 102 [2021-06-12 19:35:44,356 INFO L226 Difference]: Without dead ends: 92 [2021-06-12 19:35:44,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:35:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-12 19:35:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2021-06-12 19:35:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-12 19:35:44,359 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-12 19:35:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:44,359 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-12 19:35:44,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-12 19:35:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:44,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:44,360 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:44,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:44,573 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash -114913912, now seen corresponding path program 15 times [2021-06-12 19:35:44,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:44,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013314259] [2021-06-12 19:35:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:44,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:44,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013314259] [2021-06-12 19:35:44,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013314259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:44,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049608410] [2021-06-12 19:35:44,637 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 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 [2021-06-12 19:35:44,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:35:44,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:44,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:44,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:44,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:44,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:44,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:44,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:44,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:44,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:44,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:44,854 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:44,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:44,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:44,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049608410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:44,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:44,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:44,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339353882] [2021-06-12 19:35:44,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:44,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:44,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:44,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:44,880 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:45,078 INFO L93 Difference]: Finished difference Result 84 states and 193 transitions. [2021-06-12 19:35:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:35:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:45,079 INFO L225 Difference]: With dead ends: 84 [2021-06-12 19:35:45,079 INFO L226 Difference]: Without dead ends: 79 [2021-06-12 19:35:45,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:35:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-12 19:35:45,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-06-12 19:35:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-12 19:35:45,081 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-12 19:35:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:45,081 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-12 19:35:45,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-12 19:35:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:45,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:45,081 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:45,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 19:35:45,289 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 500750404, now seen corresponding path program 16 times [2021-06-12 19:35:45,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:45,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135340397] [2021-06-12 19:35:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:45,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:45,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135340397] [2021-06-12 19:35:45,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135340397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:45,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210310792] [2021-06-12 19:35:45,335 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 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 [2021-06-12 19:35:45,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:35:45,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:45,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:45,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:45,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:45,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:45,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:45,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:45,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:45,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:45,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:45,545 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:45,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:45,546 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:45,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210310792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:45,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:45,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:45,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703586332] [2021-06-12 19:35:45,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:45,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:45,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:45,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:45,567 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:45,810 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2021-06-12 19:35:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:35:45,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:45,811 INFO L225 Difference]: With dead ends: 96 [2021-06-12 19:35:45,811 INFO L226 Difference]: Without dead ends: 91 [2021-06-12 19:35:45,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:35:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-12 19:35:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2021-06-12 19:35:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-12 19:35:45,812 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-12 19:35:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:45,813 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-12 19:35:45,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-12 19:35:45,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:45,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:45,813 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:46,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:46,014 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:46,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:46,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2078979626, now seen corresponding path program 17 times [2021-06-12 19:35:46,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:46,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568231961] [2021-06-12 19:35:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:46,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:46,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568231961] [2021-06-12 19:35:46,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568231961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:46,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889239931] [2021-06-12 19:35:46,083 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 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 [2021-06-12 19:35:46,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:35:46,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:46,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:35:46,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:46,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:46,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:46,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:46,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:46,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:46,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-12 19:35:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:46,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889239931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:46,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:46,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:46,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118211310] [2021-06-12 19:35:46,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:46,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:46,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:46,291 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:46,479 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2021-06-12 19:35:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:35:46,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:46,480 INFO L225 Difference]: With dead ends: 89 [2021-06-12 19:35:46,480 INFO L226 Difference]: Without dead ends: 75 [2021-06-12 19:35:46,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:35:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-12 19:35:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-06-12 19:35:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 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) [2021-06-12 19:35:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-12 19:35:46,482 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-12 19:35:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:46,482 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-12 19:35:46,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-12 19:35:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:46,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:46,482 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:46,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-12 19:35:46,697 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:46,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:46,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1472404310, now seen corresponding path program 18 times [2021-06-12 19:35:46,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:46,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145370888] [2021-06-12 19:35:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:46,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:46,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145370888] [2021-06-12 19:35:46,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145370888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:46,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657191286] [2021-06-12 19:35:46,749 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:35:46,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:35:46,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:46,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:46,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:46,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:46,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:46,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:46,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:46,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:46,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:46,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:46,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:46,963 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:46,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:46,964 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:46,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657191286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:46,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:46,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:46,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503513901] [2021-06-12 19:35:46,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:46,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:46,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:46,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:46,985 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:47,239 INFO L93 Difference]: Finished difference Result 112 states and 263 transitions. [2021-06-12 19:35:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:35:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:47,240 INFO L225 Difference]: With dead ends: 112 [2021-06-12 19:35:47,240 INFO L226 Difference]: Without dead ends: 102 [2021-06-12 19:35:47,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:35:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-12 19:35:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-06-12 19:35:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 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) [2021-06-12 19:35:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-12 19:35:47,254 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-12 19:35:47,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:47,254 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-12 19:35:47,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-12 19:35:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:47,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:47,256 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:47,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 19:35:47,469 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash -621260178, now seen corresponding path program 19 times [2021-06-12 19:35:47,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:47,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812838534] [2021-06-12 19:35:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:47,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:47,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812838534] [2021-06-12 19:35:47,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812838534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:47,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960764775] [2021-06-12 19:35:47,529 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 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 [2021-06-12 19:35:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:47,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:47,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:47,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:47,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:47,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:47,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:47,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:47,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:47,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:47,767 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:47,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:47,768 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:47,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960764775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:47,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:47,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:47,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031033044] [2021-06-12 19:35:47,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:47,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:47,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:47,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:47,789 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:47,971 INFO L93 Difference]: Finished difference Result 97 states and 233 transitions. [2021-06-12 19:35:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:35:47,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:47,972 INFO L225 Difference]: With dead ends: 97 [2021-06-12 19:35:47,972 INFO L226 Difference]: Without dead ends: 92 [2021-06-12 19:35:47,972 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:35:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-12 19:35:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-06-12 19:35:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 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) [2021-06-12 19:35:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-12 19:35:47,974 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-12 19:35:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:47,974 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-12 19:35:47,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-12 19:35:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:47,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:47,974 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:48,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 19:35:48,181 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash -5595862, now seen corresponding path program 20 times [2021-06-12 19:35:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:48,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775283573] [2021-06-12 19:35:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:48,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775283573] [2021-06-12 19:35:48,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775283573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115288161] [2021-06-12 19:35:48,231 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 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 [2021-06-12 19:35:48,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:48,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:48,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:48,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:48,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:48,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:48,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:48,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:48,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:48,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:48,514 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:48,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:48,514 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:48,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115288161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:48,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:48,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:48,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723520517] [2021-06-12 19:35:48,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:48,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:48,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:48,539 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:48,781 INFO L93 Difference]: Finished difference Result 107 states and 254 transitions. [2021-06-12 19:35:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:35:48,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:48,782 INFO L225 Difference]: With dead ends: 107 [2021-06-12 19:35:48,782 INFO L226 Difference]: Without dead ends: 102 [2021-06-12 19:35:48,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:35:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-12 19:35:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-06-12 19:35:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 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) [2021-06-12 19:35:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-12 19:35:48,784 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-12 19:35:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:48,784 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-12 19:35:48,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-12 19:35:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:35:48,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:48,784 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:49,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:49,000 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1900128750, now seen corresponding path program 21 times [2021-06-12 19:35:49,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:49,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65371745] [2021-06-12 19:35:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:49,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:49,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65371745] [2021-06-12 19:35:49,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65371745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:49,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346225039] [2021-06-12 19:35:49,047 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 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 [2021-06-12 19:35:49,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:35:49,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:49,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:35:49,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:49,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:49,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-12 19:35:49,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:49,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:35:49,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:49,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:49,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-12 19:35:49,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:49,253 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 19:35:49,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:49,254 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-12 19:35:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:49,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346225039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:49,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:49,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 19:35:49,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33707875] [2021-06-12 19:35:49,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:35:49,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:49,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:35:49,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:35:49,276 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:49,535 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2021-06-12 19:35:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:35:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 14 [2021-06-12 19:35:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:49,536 INFO L225 Difference]: With dead ends: 112 [2021-06-12 19:35:49,536 INFO L226 Difference]: Without dead ends: 107 [2021-06-12 19:35:49,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:35:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-12 19:35:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-06-12 19:35:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5652173913043477) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2021-06-12 19:35:49,538 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 14 [2021-06-12 19:35:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:49,538 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2021-06-12 19:35:49,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-06-12 19:35:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2021-06-12 19:35:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:49,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:49,539 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:49,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 19:35:49,739 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash -336763768, now seen corresponding path program 22 times [2021-06-12 19:35:49,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:49,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67275408] [2021-06-12 19:35:49,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:49,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:49,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67275408] [2021-06-12 19:35:49,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67275408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:49,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654799150] [2021-06-12 19:35:49,813 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 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 [2021-06-12 19:35:49,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:35:49,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:49,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:49,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:49,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:49,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:49,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:49,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:49,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-12 19:35:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:50,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654799150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:50,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:50,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:50,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655418256] [2021-06-12 19:35:50,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:50,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:50,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:50,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:50,004 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:50,169 INFO L93 Difference]: Finished difference Result 95 states and 224 transitions. [2021-06-12 19:35:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:35:50,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:50,169 INFO L225 Difference]: With dead ends: 95 [2021-06-12 19:35:50,169 INFO L226 Difference]: Without dead ends: 81 [2021-06-12 19:35:50,170 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:35:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-12 19:35:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-06-12 19:35:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5416666666666665) internal successors, (183), 72 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) [2021-06-12 19:35:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-06-12 19:35:50,172 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 15 [2021-06-12 19:35:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:50,173 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-06-12 19:35:50,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-06-12 19:35:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:50,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:50,173 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:50,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:50,389 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash 515569656, now seen corresponding path program 23 times [2021-06-12 19:35:50,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:50,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804882233] [2021-06-12 19:35:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:50,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804882233] [2021-06-12 19:35:50,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804882233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:50,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237158554] [2021-06-12 19:35:50,462 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 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 [2021-06-12 19:35:50,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:35:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:50,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:50,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:50,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:50,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:50,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:50,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:50,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:50,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-12 19:35:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:50,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237158554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:50,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:50,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:50,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906115875] [2021-06-12 19:35:50,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:50,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:50,650 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:50,877 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-06-12 19:35:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:35:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:50,878 INFO L225 Difference]: With dead ends: 90 [2021-06-12 19:35:50,878 INFO L226 Difference]: Without dead ends: 81 [2021-06-12 19:35:50,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:35:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-12 19:35:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-06-12 19:35:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-12 19:35:50,880 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-06-12 19:35:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:50,880 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-12 19:35:50,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-12 19:35:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:50,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:50,880 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:51,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:51,081 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1259153016, now seen corresponding path program 24 times [2021-06-12 19:35:51,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:51,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258982951] [2021-06-12 19:35:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:51,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:51,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258982951] [2021-06-12 19:35:51,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258982951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:51,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211922829] [2021-06-12 19:35:51,161 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 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 [2021-06-12 19:35:51,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:35:51,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:51,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:51,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:51,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:51,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:51,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:51,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:35:51,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:51,428 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:35:51,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:51,429 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:35:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:51,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211922829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:51,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:51,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:51,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096102993] [2021-06-12 19:35:51,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:51,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:51,455 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:51,680 INFO L93 Difference]: Finished difference Result 112 states and 256 transitions. [2021-06-12 19:35:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:35:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:51,680 INFO L225 Difference]: With dead ends: 112 [2021-06-12 19:35:51,680 INFO L226 Difference]: Without dead ends: 102 [2021-06-12 19:35:51,681 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:35:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-12 19:35:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-12 19:35:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-12 19:35:51,682 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-06-12 19:35:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:51,682 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-12 19:35:51,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-12 19:35:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:51,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:51,683 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:51,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-12 19:35:51,883 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:51,884 INFO L82 PathProgramCache]: Analyzing trace with hash 49437346, now seen corresponding path program 25 times [2021-06-12 19:35:51,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:51,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503890898] [2021-06-12 19:35:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:51,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:51,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503890898] [2021-06-12 19:35:51,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503890898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:51,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77454128] [2021-06-12 19:35:51,988 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 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 [2021-06-12 19:35:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:52,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:52,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:52,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:52,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:52,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:52,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:52,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:35:52,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:52,247 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:35:52,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:52,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:35:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:52,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77454128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:52,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:52,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 19:35:52,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458736477] [2021-06-12 19:35:52,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:35:52,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:52,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:35:52,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:35:52,270 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.625) 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) [2021-06-12 19:35:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:52,545 INFO L93 Difference]: Finished difference Result 128 states and 283 transitions. [2021-06-12 19:35:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:35:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) 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 15 [2021-06-12 19:35:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:52,545 INFO L225 Difference]: With dead ends: 128 [2021-06-12 19:35:52,545 INFO L226 Difference]: Without dead ends: 118 [2021-06-12 19:35:52,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:35:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-12 19:35:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-06-12 19:35:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.539473684210526) internal successors, (193), 76 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) [2021-06-12 19:35:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2021-06-12 19:35:52,547 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 15 [2021-06-12 19:35:52,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:52,547 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2021-06-12 19:35:52,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) 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) [2021-06-12 19:35:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2021-06-12 19:35:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:52,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:52,548 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:52,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-12 19:35:52,757 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash -611826437, now seen corresponding path program 26 times [2021-06-12 19:35:52,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:52,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772488586] [2021-06-12 19:35:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:52,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:52,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772488586] [2021-06-12 19:35:52,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772488586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:52,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912273485] [2021-06-12 19:35:52,782 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 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 [2021-06-12 19:35:52,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:52,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:35:52,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:52,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912273485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:52,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:52,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 19:35:52,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283719024] [2021-06-12 19:35:52,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:35:52,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:52,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:35:52,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:35:52,827 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:35:52,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:52,858 INFO L93 Difference]: Finished difference Result 163 states and 339 transitions. [2021-06-12 19:35:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:35:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 [2021-06-12 19:35:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:52,858 INFO L225 Difference]: With dead ends: 163 [2021-06-12 19:35:52,858 INFO L226 Difference]: Without dead ends: 163 [2021-06-12 19:35:52,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:35:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-12 19:35:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2021-06-12 19:35:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 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) [2021-06-12 19:35:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 212 transitions. [2021-06-12 19:35:52,861 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 212 transitions. Word has length 15 [2021-06-12 19:35:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:52,861 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 212 transitions. [2021-06-12 19:35:52,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:35:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 212 transitions. [2021-06-12 19:35:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:52,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:52,862 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:53,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-12 19:35:53,078 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1007434568, now seen corresponding path program 27 times [2021-06-12 19:35:53,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:53,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406068122] [2021-06-12 19:35:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:53,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:53,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406068122] [2021-06-12 19:35:53,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406068122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:53,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560719171] [2021-06-12 19:35:53,161 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 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 [2021-06-12 19:35:53,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:35:53,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:53,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:53,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:53,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:53,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:53,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:53,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:53,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-12 19:35:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:53,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560719171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:53,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:53,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451254323] [2021-06-12 19:35:53,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:53,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:53,347 INFO L87 Difference]: Start difference. First operand 82 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:53,538 INFO L93 Difference]: Finished difference Result 95 states and 233 transitions. [2021-06-12 19:35:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:35:53,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:53,539 INFO L225 Difference]: With dead ends: 95 [2021-06-12 19:35:53,539 INFO L226 Difference]: Without dead ends: 86 [2021-06-12 19:35:53,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:35:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-12 19:35:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-06-12 19:35:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 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) [2021-06-12 19:35:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-12 19:35:53,541 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-12 19:35:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:53,541 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-12 19:35:53,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:53,541 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-12 19:35:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:53,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:53,541 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:53,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:53,749 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash -263851208, now seen corresponding path program 28 times [2021-06-12 19:35:53,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:53,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696882409] [2021-06-12 19:35:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:53,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:53,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696882409] [2021-06-12 19:35:53,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696882409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:53,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818322016] [2021-06-12 19:35:53,842 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 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 [2021-06-12 19:35:53,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:35:53,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:53,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:53,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:53,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:54,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:54,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:54,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:35:54,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:54,107 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:35:54,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:54,108 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:35:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:54,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818322016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:54,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:54,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:54,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306138193] [2021-06-12 19:35:54,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:54,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:54,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:54,132 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:54,373 INFO L93 Difference]: Finished difference Result 118 states and 273 transitions. [2021-06-12 19:35:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:35:54,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:54,374 INFO L225 Difference]: With dead ends: 118 [2021-06-12 19:35:54,374 INFO L226 Difference]: Without dead ends: 108 [2021-06-12 19:35:54,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:35:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-12 19:35:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-06-12 19:35:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 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) [2021-06-12 19:35:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-12 19:35:54,376 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-12 19:35:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:54,376 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-12 19:35:54,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-12 19:35:54,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:54,377 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:54,377 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:54,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-12 19:35:54,577 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:54,577 INFO L82 PathProgramCache]: Analyzing trace with hash 587292924, now seen corresponding path program 29 times [2021-06-12 19:35:54,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:54,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131400704] [2021-06-12 19:35:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:54,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:54,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131400704] [2021-06-12 19:35:54,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131400704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:54,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377680467] [2021-06-12 19:35:54,644 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 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 [2021-06-12 19:35:54,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:35:54,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:54,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:54,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:54,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:54,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:54,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:54,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:35:54,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:54,934 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:35:54,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:54,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:35:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:54,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377680467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:54,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:54,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:54,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863404793] [2021-06-12 19:35:54,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:54,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:54,959 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:55,241 INFO L93 Difference]: Finished difference Result 140 states and 313 transitions. [2021-06-12 19:35:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:35:55,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:55,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:55,242 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:35:55,242 INFO L226 Difference]: Without dead ends: 130 [2021-06-12 19:35:55,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:35:55,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-12 19:35:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-06-12 19:35:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 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) [2021-06-12 19:35:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-12 19:35:55,245 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-12 19:35:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:55,245 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-12 19:35:55,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-12 19:35:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:55,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:55,245 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:55,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-12 19:35:55,453 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1202957240, now seen corresponding path program 30 times [2021-06-12 19:35:55,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:55,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677316765] [2021-06-12 19:35:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:55,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:55,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677316765] [2021-06-12 19:35:55,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677316765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:55,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888016816] [2021-06-12 19:35:55,516 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 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 [2021-06-12 19:35:55,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:35:55,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:55,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:55,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:55,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:55,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:55,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:55,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:55,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:35:55,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:55,820 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:35:55,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:55,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:35:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:55,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888016816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:55,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:55,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:55,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270498153] [2021-06-12 19:35:55,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:55,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:55,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:55,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:55,843 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:56,241 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-06-12 19:35:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:35:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:56,242 INFO L225 Difference]: With dead ends: 157 [2021-06-12 19:35:56,242 INFO L226 Difference]: Without dead ends: 147 [2021-06-12 19:35:56,243 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:35:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-12 19:35:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2021-06-12 19:35:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5903614457831323) internal successors, (215), 83 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) [2021-06-12 19:35:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 215 transitions. [2021-06-12 19:35:56,244 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 215 transitions. Word has length 15 [2021-06-12 19:35:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:56,245 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 215 transitions. [2021-06-12 19:35:56,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 215 transitions. [2021-06-12 19:35:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:56,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:56,245 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:56,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-12 19:35:56,465 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2134830661, now seen corresponding path program 31 times [2021-06-12 19:35:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:56,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257192349] [2021-06-12 19:35:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:56,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:56,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257192349] [2021-06-12 19:35:56,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257192349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:56,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523721991] [2021-06-12 19:35:56,488 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 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 [2021-06-12 19:35:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:56,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:35:56,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:56,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523721991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:56,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:56,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:35:56,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419787276] [2021-06-12 19:35:56,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:35:56,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:35:56,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:35:56,545 INFO L87 Difference]: Start difference. First operand 84 states and 215 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:35:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:56,601 INFO L93 Difference]: Finished difference Result 200 states and 410 transitions. [2021-06-12 19:35:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:35:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 [2021-06-12 19:35:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:56,603 INFO L225 Difference]: With dead ends: 200 [2021-06-12 19:35:56,603 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 19:35:56,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:35:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 19:35:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 93. [2021-06-12 19:35:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6739130434782608) internal successors, (246), 92 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:35:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 246 transitions. [2021-06-12 19:35:56,605 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 246 transitions. Word has length 15 [2021-06-12 19:35:56,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:56,606 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 246 transitions. [2021-06-12 19:35:56,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:35:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 246 transitions. [2021-06-12 19:35:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:56,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:56,607 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:56,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:56,824 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:56,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1513780834, now seen corresponding path program 32 times [2021-06-12 19:35:56,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:56,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929271717] [2021-06-12 19:35:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:56,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:56,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929271717] [2021-06-12 19:35:56,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929271717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:56,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905148025] [2021-06-12 19:35:56,905 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 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 [2021-06-12 19:35:56,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:35:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:56,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:56,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:57,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:57,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:57,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:57,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:57,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:35:57,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-12 19:35:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:57,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905148025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:57,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:57,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:57,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945387765] [2021-06-12 19:35:57,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:57,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:57,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:57,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:57,074 INFO L87 Difference]: Start difference. First operand 93 states and 246 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:57,288 INFO L93 Difference]: Finished difference Result 107 states and 271 transitions. [2021-06-12 19:35:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:35:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:57,289 INFO L225 Difference]: With dead ends: 107 [2021-06-12 19:35:57,289 INFO L226 Difference]: Without dead ends: 98 [2021-06-12 19:35:57,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:35:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-12 19:35:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-06-12 19:35:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 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) [2021-06-12 19:35:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-12 19:35:57,291 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-12 19:35:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:57,291 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-12 19:35:57,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-12 19:35:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:57,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:57,291 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:57,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:57,501 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:57,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:57,501 INFO L82 PathProgramCache]: Analyzing trace with hash -770197474, now seen corresponding path program 33 times [2021-06-12 19:35:57,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:57,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035020726] [2021-06-12 19:35:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:57,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:57,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035020726] [2021-06-12 19:35:57,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035020726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:57,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772374649] [2021-06-12 19:35:57,587 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 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 [2021-06-12 19:35:57,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:35:57,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:57,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:57,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:57,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:57,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:57,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:57,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:35:57,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:57,875 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:35:57,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:57,876 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:35:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:57,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772374649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:57,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:57,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:57,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744094331] [2021-06-12 19:35:57,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:57,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:57,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:57,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:57,904 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:58,181 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2021-06-12 19:35:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:35:58,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:58,182 INFO L225 Difference]: With dead ends: 135 [2021-06-12 19:35:58,182 INFO L226 Difference]: Without dead ends: 125 [2021-06-12 19:35:58,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 278.5ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:35:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-12 19:35:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-06-12 19:35:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 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) [2021-06-12 19:35:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-12 19:35:58,184 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-12 19:35:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:58,184 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-12 19:35:58,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-12 19:35:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:58,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:58,184 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:58,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:35:58,389 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash 80946658, now seen corresponding path program 34 times [2021-06-12 19:35:58,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:58,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384762814] [2021-06-12 19:35:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:58,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:58,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384762814] [2021-06-12 19:35:58,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384762814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:58,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641075736] [2021-06-12 19:35:58,459 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 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 [2021-06-12 19:35:58,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:35:58,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:58,497 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:58,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:58,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:58,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:58,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:58,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:35:58,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:58,725 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:35:58,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:58,726 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:35:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:58,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641075736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:58,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:58,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:58,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324685271] [2021-06-12 19:35:58,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:58,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:58,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:58,748 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:35:59,068 INFO L93 Difference]: Finished difference Result 158 states and 363 transitions. [2021-06-12 19:35:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:35:59,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:35:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:35:59,069 INFO L225 Difference]: With dead ends: 158 [2021-06-12 19:35:59,069 INFO L226 Difference]: Without dead ends: 148 [2021-06-12 19:35:59,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:35:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-12 19:35:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2021-06-12 19:35:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 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) [2021-06-12 19:35:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-12 19:35:59,071 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-12 19:35:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:35:59,071 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-12 19:35:59,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:35:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-12 19:35:59,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:35:59,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:35:59,071 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:35:59,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-12 19:35:59,287 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:35:59,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:35:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash 696610974, now seen corresponding path program 35 times [2021-06-12 19:35:59,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:35:59,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939742283] [2021-06-12 19:35:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:35:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:35:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:59,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:35:59,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939742283] [2021-06-12 19:35:59,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939742283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:59,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998003737] [2021-06-12 19:35:59,349 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 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 [2021-06-12 19:35:59,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:35:59,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:35:59,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:35:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:35:59,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:59,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:35:59,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:35:59,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:35:59,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:35:59,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:35:59,632 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:35:59,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:35:59,633 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:35:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:35:59,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998003737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:35:59,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:35:59,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:35:59,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340348510] [2021-06-12 19:35:59,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:35:59,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:35:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:35:59,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:35:59,656 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:00,064 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2021-06-12 19:36:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:36:00,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:36:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:00,065 INFO L225 Difference]: With dead ends: 169 [2021-06-12 19:36:00,065 INFO L226 Difference]: Without dead ends: 159 [2021-06-12 19:36:00,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:36:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-12 19:36:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2021-06-12 19:36:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 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) [2021-06-12 19:36:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-12 19:36:00,067 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-12 19:36:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:00,067 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-12 19:36:00,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-12 19:36:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:00,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:00,067 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:00,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-12 19:36:00,281 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1692631710, now seen corresponding path program 36 times [2021-06-12 19:36:00,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:00,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098646791] [2021-06-12 19:36:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:00,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:00,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098646791] [2021-06-12 19:36:00,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098646791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:00,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851332039] [2021-06-12 19:36:00,340 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 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 [2021-06-12 19:36:00,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:36:00,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:00,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:36:00,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:00,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:00,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:36:00,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:00,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:00,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:36:00,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:36:00,633 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:36:00,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:00,634 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:36:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:00,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851332039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:00,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:00,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:00,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362168168] [2021-06-12 19:36:00,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:00,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:00,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:00,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:00,655 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:01,029 INFO L93 Difference]: Finished difference Result 140 states and 323 transitions. [2021-06-12 19:36:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:36:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:36:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:01,030 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:36:01,030 INFO L226 Difference]: Without dead ends: 130 [2021-06-12 19:36:01,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 402.4ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:36:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-12 19:36:01,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-06-12 19:36:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.6382978723404253) internal successors, (248), 94 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 248 transitions. [2021-06-12 19:36:01,033 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 248 transitions. Word has length 15 [2021-06-12 19:36:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:01,033 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 248 transitions. [2021-06-12 19:36:01,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 248 transitions. [2021-06-12 19:36:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:01,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:01,033 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:01,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-12 19:36:01,249 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:01,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2103321349, now seen corresponding path program 37 times [2021-06-12 19:36:01,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:01,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787309130] [2021-06-12 19:36:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:01,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:01,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787309130] [2021-06-12 19:36:01,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787309130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:01,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235978414] [2021-06-12 19:36:01,277 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 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 [2021-06-12 19:36:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:01,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:36:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:01,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235978414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:01,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:01,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:36:01,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258632162] [2021-06-12 19:36:01,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:01,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:01,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:01,340 INFO L87 Difference]: Start difference. First operand 95 states and 248 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:36:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:01,418 INFO L93 Difference]: Finished difference Result 170 states and 379 transitions. [2021-06-12 19:36:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:36:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 [2021-06-12 19:36:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:01,418 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:36:01,418 INFO L226 Difference]: Without dead ends: 170 [2021-06-12 19:36:01,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:36:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-12 19:36:01,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2021-06-12 19:36:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 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) [2021-06-12 19:36:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-06-12 19:36:01,421 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-06-12 19:36:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:01,421 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-06-12 19:36:01,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:36:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-06-12 19:36:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:01,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:01,421 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:01,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-06-12 19:36:01,633 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:01,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:01,633 INFO L82 PathProgramCache]: Analyzing trace with hash -30645896, now seen corresponding path program 38 times [2021-06-12 19:36:01,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:01,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962404695] [2021-06-12 19:36:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:01,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962404695] [2021-06-12 19:36:01,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962404695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840011922] [2021-06-12 19:36:01,716 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 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 [2021-06-12 19:36:01,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:01,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:01,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:36:01,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:01,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:01,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:36:01,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:01,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:01,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:01,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-12 19:36:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:01,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840011922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:01,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:01,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:01,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863721118] [2021-06-12 19:36:01,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:01,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:01,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:01,909 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:02,080 INFO L93 Difference]: Finished difference Result 120 states and 308 transitions. [2021-06-12 19:36:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:36:02,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:36:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:02,081 INFO L225 Difference]: With dead ends: 120 [2021-06-12 19:36:02,081 INFO L226 Difference]: Without dead ends: 111 [2021-06-12 19:36:02,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:36:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-12 19:36:02,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-06-12 19:36:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 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) [2021-06-12 19:36:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-06-12 19:36:02,083 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-06-12 19:36:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:02,083 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-06-12 19:36:02,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:02,083 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-06-12 19:36:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:02,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:02,084 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:02,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable647 [2021-06-12 19:36:02,300 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:02,300 INFO L82 PathProgramCache]: Analyzing trace with hash 712937464, now seen corresponding path program 39 times [2021-06-12 19:36:02,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:02,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069304274] [2021-06-12 19:36:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:02,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:02,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069304274] [2021-06-12 19:36:02,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069304274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:02,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394697015] [2021-06-12 19:36:02,377 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 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 [2021-06-12 19:36:02,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:02,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:02,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:36:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:02,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:02,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:36:02,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:02,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:02,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:36:02,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:36:02,606 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:36:02,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:02,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:36:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:02,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394697015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:02,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:02,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:02,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072394953] [2021-06-12 19:36:02,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:02,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:02,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:02,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:02,632 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:02,897 INFO L93 Difference]: Finished difference Result 154 states and 382 transitions. [2021-06-12 19:36:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:36:02,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:36:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:02,898 INFO L225 Difference]: With dead ends: 154 [2021-06-12 19:36:02,898 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 19:36:02,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:36:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 19:36:02,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-06-12 19:36:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 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) [2021-06-12 19:36:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-06-12 19:36:02,900 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-06-12 19:36:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:02,900 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-06-12 19:36:02,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-06-12 19:36:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:02,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:02,901 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:03,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:03,117 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:03,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1564081596, now seen corresponding path program 40 times [2021-06-12 19:36:03,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:03,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314221983] [2021-06-12 19:36:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:03,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:03,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314221983] [2021-06-12 19:36:03,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314221983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:03,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958296036] [2021-06-12 19:36:03,182 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 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 [2021-06-12 19:36:03,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:03,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:03,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:36:03,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:03,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:03,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:36:03,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:03,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:03,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:36:03,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:36:03,444 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:36:03,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:03,445 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:36:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:03,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958296036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:03,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:03,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:03,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280960107] [2021-06-12 19:36:03,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:03,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:03,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:03,468 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:03,892 INFO L93 Difference]: Finished difference Result 176 states and 417 transitions. [2021-06-12 19:36:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:36:03,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:36:03,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:03,893 INFO L225 Difference]: With dead ends: 176 [2021-06-12 19:36:03,893 INFO L226 Difference]: Without dead ends: 166 [2021-06-12 19:36:03,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:36:03,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-12 19:36:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2021-06-12 19:36:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 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) [2021-06-12 19:36:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-06-12 19:36:03,895 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-06-12 19:36:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:03,895 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-06-12 19:36:03,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-06-12 19:36:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:03,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:03,896 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:04,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:04,112 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:04,112 INFO L82 PathProgramCache]: Analyzing trace with hash 902817813, now seen corresponding path program 41 times [2021-06-12 19:36:04,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:04,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842572463] [2021-06-12 19:36:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:04,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:04,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842572463] [2021-06-12 19:36:04,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842572463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:04,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740830339] [2021-06-12 19:36:04,135 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 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 [2021-06-12 19:36:04,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:04,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:04,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:36:04,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:04,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740830339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:04,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:04,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 19:36:04,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074059579] [2021-06-12 19:36:04,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:36:04,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:04,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:36:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:36:04,179 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:36:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:04,212 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2021-06-12 19:36:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:36:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 [2021-06-12 19:36:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:04,212 INFO L225 Difference]: With dead ends: 196 [2021-06-12 19:36:04,213 INFO L226 Difference]: Without dead ends: 196 [2021-06-12 19:36:04,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-12 19:36:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2021-06-12 19:36:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.7666666666666666) internal successors, (332), 120 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) [2021-06-12 19:36:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 332 transitions. [2021-06-12 19:36:04,222 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 332 transitions. Word has length 15 [2021-06-12 19:36:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:04,222 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 332 transitions. [2021-06-12 19:36:04,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:36:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 332 transitions. [2021-06-12 19:36:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:04,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:04,223 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:04,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-06-12 19:36:04,438 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:04,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:04,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2115221384, now seen corresponding path program 42 times [2021-06-12 19:36:04,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:04,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993246717] [2021-06-12 19:36:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:04,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:04,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993246717] [2021-06-12 19:36:04,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993246717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:04,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001373166] [2021-06-12 19:36:04,496 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:36:04,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:36:04,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:04,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:36:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:04,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:04,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:36:04,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:04,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:04,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:36:04,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:36:04,793 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:36:04,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:04,794 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:36:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:04,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001373166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:04,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:04,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:04,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368456891] [2021-06-12 19:36:04,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:04,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:04,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:04,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:04,817 INFO L87 Difference]: Start difference. First operand 121 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:05,272 INFO L93 Difference]: Finished difference Result 209 states and 492 transitions. [2021-06-12 19:36:05,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:36:05,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:36:05,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:05,273 INFO L225 Difference]: With dead ends: 209 [2021-06-12 19:36:05,273 INFO L226 Difference]: Without dead ends: 199 [2021-06-12 19:36:05,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:36:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-12 19:36:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 120. [2021-06-12 19:36:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.764705882352941) internal successors, (329), 119 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) [2021-06-12 19:36:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 329 transitions. [2021-06-12 19:36:05,275 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 329 transitions. Word has length 15 [2021-06-12 19:36:05,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:05,276 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 329 transitions. [2021-06-12 19:36:05,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 329 transitions. [2021-06-12 19:36:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:05,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:05,276 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:05,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-12 19:36:05,485 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041989, now seen corresponding path program 43 times [2021-06-12 19:36:05,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:05,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242931961] [2021-06-12 19:36:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:05,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:05,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242931961] [2021-06-12 19:36:05,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242931961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:05,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278527229] [2021-06-12 19:36:05,510 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 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 [2021-06-12 19:36:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:05,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:36:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:05,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278527229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:05,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:05,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:36:05,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179853677] [2021-06-12 19:36:05,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:05,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:05,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:05,564 INFO L87 Difference]: Start difference. First operand 120 states and 329 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:36:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:05,624 INFO L93 Difference]: Finished difference Result 219 states and 478 transitions. [2021-06-12 19:36:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:36:05,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 [2021-06-12 19:36:05,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:05,625 INFO L225 Difference]: With dead ends: 219 [2021-06-12 19:36:05,625 INFO L226 Difference]: Without dead ends: 219 [2021-06-12 19:36:05,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:36:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-12 19:36:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 114. [2021-06-12 19:36:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 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) [2021-06-12 19:36:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-12 19:36:05,627 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-12 19:36:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:05,627 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-12 19:36:05,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:36:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-12 19:36:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:05,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:05,628 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:05,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:05,843 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:05,843 INFO L82 PathProgramCache]: Analyzing trace with hash -209496772, now seen corresponding path program 44 times [2021-06-12 19:36:05,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:05,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195885530] [2021-06-12 19:36:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:05,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:05,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195885530] [2021-06-12 19:36:05,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195885530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:05,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564067572] [2021-06-12 19:36:05,899 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 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 [2021-06-12 19:36:05,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:05,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:05,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:36:05,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:06,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:06,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:36:06,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:06,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:06,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:36:06,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:36:06,192 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:36:06,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:06,193 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:36:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:06,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564067572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:06,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:06,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:06,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102232332] [2021-06-12 19:36:06,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:06,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:06,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:06,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:06,217 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:06,581 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2021-06-12 19:36:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:36:06,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:36:06,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:06,585 INFO L225 Difference]: With dead ends: 172 [2021-06-12 19:36:06,585 INFO L226 Difference]: Without dead ends: 162 [2021-06-12 19:36:06,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:36:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-12 19:36:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2021-06-12 19:36:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 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) [2021-06-12 19:36:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-12 19:36:06,587 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-12 19:36:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:06,587 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-12 19:36:06,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-12 19:36:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:06,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:06,588 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:06,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:06,793 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash -620186411, now seen corresponding path program 45 times [2021-06-12 19:36:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:06,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617628715] [2021-06-12 19:36:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:06,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:06,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617628715] [2021-06-12 19:36:06,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617628715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:06,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975409222] [2021-06-12 19:36:06,835 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 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 [2021-06-12 19:36:06,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:06,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:06,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:36:06,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:06,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975409222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:06,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:06,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:36:06,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682478492] [2021-06-12 19:36:06,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:06,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:06,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:06,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:06,899 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:36:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:06,972 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2021-06-12 19:36:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:36:06,973 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 [2021-06-12 19:36:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:06,974 INFO L225 Difference]: With dead ends: 175 [2021-06-12 19:36:06,974 INFO L226 Difference]: Without dead ends: 175 [2021-06-12 19:36:06,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:36:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-12 19:36:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-06-12 19:36:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 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) [2021-06-12 19:36:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-12 19:36:06,980 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-12 19:36:06,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:06,980 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-12 19:36:06,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:36:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-12 19:36:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:06,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:06,981 INFO L472 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:07,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable819 [2021-06-12 19:36:07,197 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1261575944, now seen corresponding path program 46 times [2021-06-12 19:36:07,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:07,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801679754] [2021-06-12 19:36:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:07,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801679754] [2021-06-12 19:36:07,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801679754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675688537] [2021-06-12 19:36:07,294 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 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 [2021-06-12 19:36:07,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:07,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:07,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:36:07,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:07,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:07,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-12 19:36:07,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:07,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:07,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-12 19:36:07,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 19:36:07,618 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:36:07,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:07,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-12 19:36:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:07,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675688537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:07,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:07,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:07,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413184720] [2021-06-12 19:36:07,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:07,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:07,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:07,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:07,641 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:08,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:08,061 INFO L93 Difference]: Finished difference Result 162 states and 391 transitions. [2021-06-12 19:36:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:36:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 15 [2021-06-12 19:36:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:08,061 INFO L225 Difference]: With dead ends: 162 [2021-06-12 19:36:08,061 INFO L226 Difference]: Without dead ends: 152 [2021-06-12 19:36:08,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:36:08,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-12 19:36:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-06-12 19:36:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.7217391304347824) internal successors, (313), 115 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) [2021-06-12 19:36:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 313 transitions. [2021-06-12 19:36:08,063 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 313 transitions. Word has length 15 [2021-06-12 19:36:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:08,064 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 313 transitions. [2021-06-12 19:36:08,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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) [2021-06-12 19:36:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 313 transitions. [2021-06-12 19:36:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:36:08,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:08,064 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:08,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-12 19:36:08,265 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1126532677, now seen corresponding path program 47 times [2021-06-12 19:36:08,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:08,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569127166] [2021-06-12 19:36:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:08,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:08,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569127166] [2021-06-12 19:36:08,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569127166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:08,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029319513] [2021-06-12 19:36:08,295 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 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 [2021-06-12 19:36:08,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:08,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:08,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:36:08,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:08,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029319513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:08,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:08,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:36:08,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331779501] [2021-06-12 19:36:08,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:08,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:08,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:08,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:08,346 INFO L87 Difference]: Start difference. First operand 116 states and 313 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:36:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:08,431 INFO L93 Difference]: Finished difference Result 188 states and 448 transitions. [2021-06-12 19:36:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:36:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 [2021-06-12 19:36:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:08,432 INFO L225 Difference]: With dead ends: 188 [2021-06-12 19:36:08,432 INFO L226 Difference]: Without dead ends: 188 [2021-06-12 19:36:08,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-12 19:36:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2021-06-12 19:36:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.7355371900826446) internal successors, (331), 121 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) [2021-06-12 19:36:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 331 transitions. [2021-06-12 19:36:08,434 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 331 transitions. Word has length 15 [2021-06-12 19:36:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:08,434 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 331 transitions. [2021-06-12 19:36:08,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-06-12 19:36:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 331 transitions. [2021-06-12 19:36:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:08,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:08,435 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:08,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:08,651 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:08,651 INFO L82 PathProgramCache]: Analyzing trace with hash -43188332, now seen corresponding path program 48 times [2021-06-12 19:36:08,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:08,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38668431] [2021-06-12 19:36:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:08,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:08,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38668431] [2021-06-12 19:36:08,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38668431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:08,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207539027] [2021-06-12 19:36:08,707 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 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 [2021-06-12 19:36:08,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:36:08,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:08,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:36:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:08,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:08,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:36:08,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:08,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:08,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:08,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:36:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:08,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207539027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:08,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:08,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:08,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041039698] [2021-06-12 19:36:08,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:08,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:08,946 INFO L87 Difference]: Start difference. First operand 122 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:09,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:09,162 INFO L93 Difference]: Finished difference Result 161 states and 428 transitions. [2021-06-12 19:36:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:36:09,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 [2021-06-12 19:36:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:09,163 INFO L225 Difference]: With dead ends: 161 [2021-06-12 19:36:09,163 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 19:36:09,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:36:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 19:36:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-06-12 19:36:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-06-12 19:36:09,165 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-06-12 19:36:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:09,165 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-06-12 19:36:09,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-06-12 19:36:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:09,166 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:09,166 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:09,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:09,373 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:09,373 INFO L82 PathProgramCache]: Analyzing trace with hash 343012782, now seen corresponding path program 49 times [2021-06-12 19:36:09,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:09,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202418094] [2021-06-12 19:36:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:09,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:09,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202418094] [2021-06-12 19:36:09,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202418094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:09,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700705850] [2021-06-12 19:36:09,432 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 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 [2021-06-12 19:36:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:36:09,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:09,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:09,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:36:09,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:09,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:09,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:09,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:36:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:09,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700705850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:09,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:09,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:09,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101021337] [2021-06-12 19:36:09,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:09,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:09,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:09,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:09,670 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) 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) [2021-06-12 19:36:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:09,920 INFO L93 Difference]: Finished difference Result 174 states and 444 transitions. [2021-06-12 19:36:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:36:09,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) 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 [2021-06-12 19:36:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:09,921 INFO L225 Difference]: With dead ends: 174 [2021-06-12 19:36:09,921 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 19:36:09,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:36:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 19:36:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-06-12 19:36:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-06-12 19:36:09,923 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-06-12 19:36:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:09,923 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-06-12 19:36:09,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) 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) [2021-06-12 19:36:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-06-12 19:36:09,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:09,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:09,923 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:10,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:10,124 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:10,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:10,124 INFO L82 PathProgramCache]: Analyzing trace with hash -318251001, now seen corresponding path program 50 times [2021-06-12 19:36:10,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:10,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975697999] [2021-06-12 19:36:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:10,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:10,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975697999] [2021-06-12 19:36:10,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975697999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:10,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692906982] [2021-06-12 19:36:10,150 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 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 [2021-06-12 19:36:10,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:10,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:10,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:10,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692906982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:10,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:10,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:36:10,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427408228] [2021-06-12 19:36:10,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:10,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:10,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:10,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:10,204 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:10,243 INFO L93 Difference]: Finished difference Result 261 states and 586 transitions. [2021-06-12 19:36:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:36:10,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-06-12 19:36:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:10,244 INFO L225 Difference]: With dead ends: 261 [2021-06-12 19:36:10,244 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:36:10,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:36:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 136. [2021-06-12 19:36:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:10,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-12 19:36:10,246 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-12 19:36:10,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:10,246 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-12 19:36:10,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:10,246 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-12 19:36:10,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:10,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:10,247 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:10,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable906 [2021-06-12 19:36:10,449 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash -713859132, now seen corresponding path program 51 times [2021-06-12 19:36:10,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:10,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092409116] [2021-06-12 19:36:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:10,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:10,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092409116] [2021-06-12 19:36:10,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092409116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:10,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754114210] [2021-06-12 19:36:10,518 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 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 [2021-06-12 19:36:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:10,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:36:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:10,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:10,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:36:10,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:10,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:10,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:10,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:36:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:10,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754114210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:10,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:10,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:10,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733265] [2021-06-12 19:36:10,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:10,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:10,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:10,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:10,748 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:10,924 INFO L93 Difference]: Finished difference Result 173 states and 438 transitions. [2021-06-12 19:36:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:36:10,924 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 [2021-06-12 19:36:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:10,924 INFO L225 Difference]: With dead ends: 173 [2021-06-12 19:36:10,925 INFO L226 Difference]: Without dead ends: 168 [2021-06-12 19:36:10,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:36:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-12 19:36:10,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-06-12 19:36:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-12 19:36:10,927 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-12 19:36:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:10,927 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-12 19:36:10,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-12 19:36:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:10,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:10,927 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:11,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:11,143 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1841255225, now seen corresponding path program 52 times [2021-06-12 19:36:11,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:11,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972537610] [2021-06-12 19:36:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:11,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:11,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972537610] [2021-06-12 19:36:11,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972537610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:11,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209430399] [2021-06-12 19:36:11,171 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 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 [2021-06-12 19:36:11,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:11,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:11,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:11,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209430399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:11,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:11,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:11,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141697016] [2021-06-12 19:36:11,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:11,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:11,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:11,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:11,217 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:11,273 INFO L93 Difference]: Finished difference Result 272 states and 604 transitions. [2021-06-12 19:36:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:36:11,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-06-12 19:36:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:11,277 INFO L225 Difference]: With dead ends: 272 [2021-06-12 19:36:11,277 INFO L226 Difference]: Without dead ends: 272 [2021-06-12 19:36:11,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:36:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-12 19:36:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 136. [2021-06-12 19:36:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-12 19:36:11,280 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-12 19:36:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:11,280 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-12 19:36:11,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-12 19:36:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:11,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:11,280 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:11,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-06-12 19:36:11,493 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1220205398, now seen corresponding path program 53 times [2021-06-12 19:36:11,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:11,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867311803] [2021-06-12 19:36:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:11,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:11,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867311803] [2021-06-12 19:36:11,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867311803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:11,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920370159] [2021-06-12 19:36:11,548 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 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 [2021-06-12 19:36:11,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:11,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:11,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:36:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:11,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:11,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:36:11,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:11,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:11,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:11,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:36:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:11,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920370159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:11,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:11,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:11,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140335712] [2021-06-12 19:36:11,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:11,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:11,749 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:11,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:11,913 INFO L93 Difference]: Finished difference Result 152 states and 404 transitions. [2021-06-12 19:36:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:36:11,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 [2021-06-12 19:36:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:11,914 INFO L225 Difference]: With dead ends: 152 [2021-06-12 19:36:11,914 INFO L226 Difference]: Without dead ends: 147 [2021-06-12 19:36:11,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:36:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-12 19:36:11,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-06-12 19:36:11,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.774436090225564) internal successors, (369), 133 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 369 transitions. [2021-06-12 19:36:11,916 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 369 transitions. Word has length 16 [2021-06-12 19:36:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:11,916 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 369 transitions. [2021-06-12 19:36:11,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 369 transitions. [2021-06-12 19:36:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:11,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:11,917 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:12,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:12,125 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1947365805, now seen corresponding path program 54 times [2021-06-12 19:36:12,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:12,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296186818] [2021-06-12 19:36:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:12,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:12,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296186818] [2021-06-12 19:36:12,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296186818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:12,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031011024] [2021-06-12 19:36:12,151 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 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 [2021-06-12 19:36:12,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:36:12,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:12,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:12,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:12,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031011024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:12,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:12,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:12,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989222725] [2021-06-12 19:36:12,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:12,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:12,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:12,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:12,210 INFO L87 Difference]: Start difference. First operand 134 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:12,258 INFO L93 Difference]: Finished difference Result 271 states and 600 transitions. [2021-06-12 19:36:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:36:12,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-06-12 19:36:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:12,259 INFO L225 Difference]: With dead ends: 271 [2021-06-12 19:36:12,259 INFO L226 Difference]: Without dead ends: 271 [2021-06-12 19:36:12,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:36:12,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-12 19:36:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 137. [2021-06-12 19:36:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8088235294117645) internal successors, (382), 136 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 382 transitions. [2021-06-12 19:36:12,262 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 382 transitions. Word has length 16 [2021-06-12 19:36:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:12,262 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 382 transitions. [2021-06-12 19:36:12,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 382 transitions. [2021-06-12 19:36:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:12,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:12,262 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:12,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-12 19:36:12,479 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1809745913, now seen corresponding path program 55 times [2021-06-12 19:36:12,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:12,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253023846] [2021-06-12 19:36:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:12,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:12,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253023846] [2021-06-12 19:36:12,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253023846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:12,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408237241] [2021-06-12 19:36:12,510 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 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 [2021-06-12 19:36:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:12,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:12,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408237241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:12,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:12,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:12,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93343207] [2021-06-12 19:36:12,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:12,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:12,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:12,569 INFO L87 Difference]: Start difference. First operand 137 states and 382 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:12,651 INFO L93 Difference]: Finished difference Result 294 states and 636 transitions. [2021-06-12 19:36:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:36:12,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-12 19:36:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:12,653 INFO L225 Difference]: With dead ends: 294 [2021-06-12 19:36:12,653 INFO L226 Difference]: Without dead ends: 294 [2021-06-12 19:36:12,653 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-12 19:36:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 138. [2021-06-12 19:36:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.795620437956204) internal successors, (383), 137 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) [2021-06-12 19:36:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 383 transitions. [2021-06-12 19:36:12,656 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 383 transitions. Word has length 16 [2021-06-12 19:36:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:12,656 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 383 transitions. [2021-06-12 19:36:12,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 383 transitions. [2021-06-12 19:36:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:12,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:12,656 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:12,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:12,865 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash 262929540, now seen corresponding path program 56 times [2021-06-12 19:36:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:12,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762435736] [2021-06-12 19:36:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:12,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:12,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762435736] [2021-06-12 19:36:12,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762435736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:12,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866072720] [2021-06-12 19:36:12,924 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 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 [2021-06-12 19:36:12,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:12,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:36:12,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:13,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:13,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:36:13,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:13,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:13,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:13,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:36:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:13,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866072720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:13,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:13,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:13,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720318553] [2021-06-12 19:36:13,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:13,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:13,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:13,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:13,149 INFO L87 Difference]: Start difference. First operand 138 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:13,320 INFO L93 Difference]: Finished difference Result 156 states and 422 transitions. [2021-06-12 19:36:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:36:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 [2021-06-12 19:36:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:13,321 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:36:13,321 INFO L226 Difference]: Without dead ends: 151 [2021-06-12 19:36:13,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:36:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-12 19:36:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-06-12 19:36:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8043478260869565) internal successors, (387), 138 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 387 transitions. [2021-06-12 19:36:13,334 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 387 transitions. Word has length 16 [2021-06-12 19:36:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:13,334 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 387 transitions. [2021-06-12 19:36:13,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 387 transitions. [2021-06-12 19:36:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:13,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:13,334 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:13,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:13,535 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:13,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1196393249, now seen corresponding path program 57 times [2021-06-12 19:36:13,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:13,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537715362] [2021-06-12 19:36:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:13,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:13,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537715362] [2021-06-12 19:36:13,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537715362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:13,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414490683] [2021-06-12 19:36:13,561 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 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 [2021-06-12 19:36:13,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:13,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:36:13,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414490683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:13,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:13,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 19:36:13,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16780621] [2021-06-12 19:36:13,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:36:13,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:13,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:36:13,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:36:13,605 INFO L87 Difference]: Start difference. First operand 139 states and 387 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:36:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:13,633 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2021-06-12 19:36:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:36:13,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 16 [2021-06-12 19:36:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:13,634 INFO L225 Difference]: With dead ends: 241 [2021-06-12 19:36:13,634 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 19:36:13,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 19:36:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2021-06-12 19:36:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8516129032258064) internal successors, (442), 155 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 442 transitions. [2021-06-12 19:36:13,636 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 442 transitions. Word has length 16 [2021-06-12 19:36:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:13,636 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 442 transitions. [2021-06-12 19:36:13,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:36:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 442 transitions. [2021-06-12 19:36:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:13,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:13,637 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:13,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-06-12 19:36:13,841 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash -864466553, now seen corresponding path program 58 times [2021-06-12 19:36:13,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:13,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592526463] [2021-06-12 19:36:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:13,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:13,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592526463] [2021-06-12 19:36:13,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592526463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:13,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038354020] [2021-06-12 19:36:13,874 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 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 [2021-06-12 19:36:13,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:13,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:13,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038354020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:13,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:13,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:13,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856903867] [2021-06-12 19:36:13,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:13,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:13,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:13,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:13,920 INFO L87 Difference]: Start difference. First operand 156 states and 442 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:13,967 INFO L93 Difference]: Finished difference Result 263 states and 603 transitions. [2021-06-12 19:36:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:36:13,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-06-12 19:36:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:13,968 INFO L225 Difference]: With dead ends: 263 [2021-06-12 19:36:13,968 INFO L226 Difference]: Without dead ends: 263 [2021-06-12 19:36:13,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:36:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-12 19:36:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-06-12 19:36:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8125) internal successors, (405), 144 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) [2021-06-12 19:36:13,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 405 transitions. [2021-06-12 19:36:13,970 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 405 transitions. Word has length 16 [2021-06-12 19:36:13,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:13,970 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 405 transitions. [2021-06-12 19:36:13,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 405 transitions. [2021-06-12 19:36:13,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:13,971 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:13,971 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:14,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable980 [2021-06-12 19:36:14,188 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash -326610975, now seen corresponding path program 59 times [2021-06-12 19:36:14,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:14,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644216679] [2021-06-12 19:36:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:14,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:14,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644216679] [2021-06-12 19:36:14,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644216679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:14,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803557749] [2021-06-12 19:36:14,215 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 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 [2021-06-12 19:36:14,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:36:14,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:14,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:14,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:14,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803557749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:14,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:14,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:14,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236599159] [2021-06-12 19:36:14,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:14,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:14,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:14,283 INFO L87 Difference]: Start difference. First operand 145 states and 405 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:14,361 INFO L93 Difference]: Finished difference Result 279 states and 612 transitions. [2021-06-12 19:36:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:36:14,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-12 19:36:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:14,362 INFO L225 Difference]: With dead ends: 279 [2021-06-12 19:36:14,362 INFO L226 Difference]: Without dead ends: 279 [2021-06-12 19:36:14,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-12 19:36:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 139. [2021-06-12 19:36:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.7971014492753623) internal successors, (386), 138 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 386 transitions. [2021-06-12 19:36:14,364 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 386 transitions. Word has length 16 [2021-06-12 19:36:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:14,364 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 386 transitions. [2021-06-12 19:36:14,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 386 transitions. [2021-06-12 19:36:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:14,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:14,365 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:14,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable981,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:14,574 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:14,574 INFO L82 PathProgramCache]: Analyzing trace with hash -832957241, now seen corresponding path program 60 times [2021-06-12 19:36:14,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:14,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908348684] [2021-06-12 19:36:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:14,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:14,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908348684] [2021-06-12 19:36:14,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908348684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:14,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436050811] [2021-06-12 19:36:14,602 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 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 [2021-06-12 19:36:14,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:36:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:14,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:14,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436050811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:14,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:14,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:14,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477759007] [2021-06-12 19:36:14,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:14,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:14,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:14,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:14,654 INFO L87 Difference]: Start difference. First operand 139 states and 386 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:14,757 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2021-06-12 19:36:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:36:14,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-12 19:36:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:14,758 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:36:14,758 INFO L226 Difference]: Without dead ends: 234 [2021-06-12 19:36:14,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:36:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-12 19:36:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 137. [2021-06-12 19:36:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.7941176470588234) internal successors, (380), 136 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 380 transitions. [2021-06-12 19:36:14,760 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 380 transitions. Word has length 16 [2021-06-12 19:36:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:14,761 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 380 transitions. [2021-06-12 19:36:14,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 380 transitions. [2021-06-12 19:36:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:14,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:14,761 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:14,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-12 19:36:14,976 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:14,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1004527638, now seen corresponding path program 61 times [2021-06-12 19:36:14,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:14,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891606201] [2021-06-12 19:36:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:15,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:15,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891606201] [2021-06-12 19:36:15,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891606201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:15,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950720022] [2021-06-12 19:36:15,033 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 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 [2021-06-12 19:36:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:15,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:36:15,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:15,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:15,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:36:15,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:15,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:15,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:15,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:36:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:15,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950720022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:15,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:15,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:15,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233754503] [2021-06-12 19:36:15,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:15,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:15,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:15,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:15,276 INFO L87 Difference]: Start difference. First operand 137 states and 380 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:15,455 INFO L93 Difference]: Finished difference Result 184 states and 502 transitions. [2021-06-12 19:36:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:36:15,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 [2021-06-12 19:36:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:15,456 INFO L225 Difference]: With dead ends: 184 [2021-06-12 19:36:15,456 INFO L226 Difference]: Without dead ends: 179 [2021-06-12 19:36:15,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:36:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-12 19:36:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-06-12 19:36:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-06-12 19:36:15,458 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-06-12 19:36:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:15,458 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-06-12 19:36:15,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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) [2021-06-12 19:36:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-06-12 19:36:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:15,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:15,458 INFO L472 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:15,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-12 19:36:15,659 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:15,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash 590199854, now seen corresponding path program 62 times [2021-06-12 19:36:15,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:15,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70819968] [2021-06-12 19:36:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:15,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:15,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70819968] [2021-06-12 19:36:15,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70819968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:15,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898298942] [2021-06-12 19:36:15,719 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 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 [2021-06-12 19:36:15,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:36:15,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:15,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:15,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-12 19:36:15,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:15,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:15,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:15,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-12 19:36:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:15,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898298942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:15,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:15,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:36:15,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168178590] [2021-06-12 19:36:15,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:36:15,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:15,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:36:15,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:15,944 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) 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) [2021-06-12 19:36:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:16,219 INFO L93 Difference]: Finished difference Result 197 states and 515 transitions. [2021-06-12 19:36:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:36:16,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) 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 [2021-06-12 19:36:16,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:16,220 INFO L225 Difference]: With dead ends: 197 [2021-06-12 19:36:16,220 INFO L226 Difference]: Without dead ends: 192 [2021-06-12 19:36:16,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:36:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-12 19:36:16,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-06-12 19:36:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-06-12 19:36:16,222 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-06-12 19:36:16,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:16,222 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-06-12 19:36:16,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) 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) [2021-06-12 19:36:16,222 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-06-12 19:36:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:16,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:16,222 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:16,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1018 [2021-06-12 19:36:16,438 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash -71063929, now seen corresponding path program 63 times [2021-06-12 19:36:16,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:16,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799042663] [2021-06-12 19:36:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:16,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:16,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799042663] [2021-06-12 19:36:16,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799042663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:16,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884323422] [2021-06-12 19:36:16,467 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 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 [2021-06-12 19:36:16,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:16,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:16,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884323422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:16,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:16,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:16,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010194659] [2021-06-12 19:36:16,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:16,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:16,514 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:16,553 INFO L93 Difference]: Finished difference Result 269 states and 624 transitions. [2021-06-12 19:36:16,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:36:16,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-06-12 19:36:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:16,554 INFO L225 Difference]: With dead ends: 269 [2021-06-12 19:36:16,554 INFO L226 Difference]: Without dead ends: 269 [2021-06-12 19:36:16,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-12 19:36:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 158. [2021-06-12 19:36:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8980891719745223) internal successors, (455), 157 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 455 transitions. [2021-06-12 19:36:16,557 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 455 transitions. Word has length 16 [2021-06-12 19:36:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:16,557 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 455 transitions. [2021-06-12 19:36:16,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 455 transitions. [2021-06-12 19:36:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:16,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:16,557 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:16,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:16,758 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2131923731, now seen corresponding path program 64 times [2021-06-12 19:36:16,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:16,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408616142] [2021-06-12 19:36:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:16,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:16,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408616142] [2021-06-12 19:36:16,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408616142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:16,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543256981] [2021-06-12 19:36:16,787 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 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 [2021-06-12 19:36:16,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:16,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:16,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:16,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543256981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:16,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:16,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:16,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183170703] [2021-06-12 19:36:16,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:16,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:16,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:16,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:16,831 INFO L87 Difference]: Start difference. First operand 158 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:16,872 INFO L93 Difference]: Finished difference Result 244 states and 614 transitions. [2021-06-12 19:36:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:36:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-06-12 19:36:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:16,873 INFO L225 Difference]: With dead ends: 244 [2021-06-12 19:36:16,873 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 19:36:16,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 19:36:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-06-12 19:36:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-06-12 19:36:16,876 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 16 [2021-06-12 19:36:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:16,876 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-06-12 19:36:16,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-06-12 19:36:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:16,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:16,876 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:17,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:17,092 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:17,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1594068153, now seen corresponding path program 65 times [2021-06-12 19:36:17,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:17,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604820038] [2021-06-12 19:36:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:17,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:17,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604820038] [2021-06-12 19:36:17,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604820038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:17,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309161688] [2021-06-12 19:36:17,121 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 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 [2021-06-12 19:36:17,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:17,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:17,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309161688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:17,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:17,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:17,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734295538] [2021-06-12 19:36:17,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:17,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:17,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:17,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:17,177 INFO L87 Difference]: Start difference. First operand 175 states and 508 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:17,248 INFO L93 Difference]: Finished difference Result 268 states and 649 transitions. [2021-06-12 19:36:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:36:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-12 19:36:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:17,249 INFO L225 Difference]: With dead ends: 268 [2021-06-12 19:36:17,249 INFO L226 Difference]: Without dead ends: 268 [2021-06-12 19:36:17,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:36:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-12 19:36:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 172. [2021-06-12 19:36:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-06-12 19:36:17,251 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-06-12 19:36:17,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:17,252 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-06-12 19:36:17,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-06-12 19:36:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:17,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:17,252 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:17,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:17,468 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2100414419, now seen corresponding path program 66 times [2021-06-12 19:36:17,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:17,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031617769] [2021-06-12 19:36:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:17,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:17,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031617769] [2021-06-12 19:36:17,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031617769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:17,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457603326] [2021-06-12 19:36:17,499 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 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 [2021-06-12 19:36:17,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:36:17,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:17,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:17,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:17,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457603326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:17,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:17,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:17,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868702370] [2021-06-12 19:36:17,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:17,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:17,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:17,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:17,559 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:17,654 INFO L93 Difference]: Finished difference Result 237 states and 603 transitions. [2021-06-12 19:36:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:36:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-12 19:36:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:17,655 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:36:17,655 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 19:36:17,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:36:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 19:36:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2021-06-12 19:36:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-06-12 19:36:17,658 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-06-12 19:36:17,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:17,658 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-06-12 19:36:17,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-06-12 19:36:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:36:17,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:17,658 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:17,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:17,873 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash -617279481, now seen corresponding path program 67 times [2021-06-12 19:36:17,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:17,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120246980] [2021-06-12 19:36:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:17,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:17,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120246980] [2021-06-12 19:36:17,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120246980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:17,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296171768] [2021-06-12 19:36:17,903 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 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 [2021-06-12 19:36:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:17,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:36:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:17,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296171768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:17,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:17,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:17,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120583425] [2021-06-12 19:36:17,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:17,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:17,952 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:18,043 INFO L93 Difference]: Finished difference Result 261 states and 681 transitions. [2021-06-12 19:36:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:36:18,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-06-12 19:36:18,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:18,045 INFO L225 Difference]: With dead ends: 261 [2021-06-12 19:36:18,045 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:36:18,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:36:18,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:36:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-06-12 19:36:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-06-12 19:36:18,047 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 16 [2021-06-12 19:36:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:18,047 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-06-12 19:36:18,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-06-12 19:36:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-06-12 19:36:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:18,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:18,048 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:18,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:18,248 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:18,248 INFO L82 PathProgramCache]: Analyzing trace with hash 467715592, now seen corresponding path program 68 times [2021-06-12 19:36:18,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:18,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900603404] [2021-06-12 19:36:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:18,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:18,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900603404] [2021-06-12 19:36:18,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900603404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:18,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485975971] [2021-06-12 19:36:18,293 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:36:18,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:18,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:18,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:18,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485975971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:18,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:18,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:18,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283419563] [2021-06-12 19:36:18,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:18,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:18,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:18,355 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:18,447 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-06-12 19:36:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:36:18,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:18,448 INFO L225 Difference]: With dead ends: 282 [2021-06-12 19:36:18,448 INFO L226 Difference]: Without dead ends: 282 [2021-06-12 19:36:18,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-12 19:36:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 190. [2021-06-12 19:36:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-06-12 19:36:18,451 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-06-12 19:36:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:18,451 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-06-12 19:36:18,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-06-12 19:36:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:18,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:18,452 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:18,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1055 [2021-06-12 19:36:18,660 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:18,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1312212869, now seen corresponding path program 69 times [2021-06-12 19:36:18,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:18,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383120138] [2021-06-12 19:36:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:18,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:18,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383120138] [2021-06-12 19:36:18,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383120138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:18,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130278692] [2021-06-12 19:36:18,691 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 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 [2021-06-12 19:36:18,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:18,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:18,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:18,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:18,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130278692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:18,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:18,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:18,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767538723] [2021-06-12 19:36:18,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:18,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:18,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:18,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:18,752 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:18,869 INFO L93 Difference]: Finished difference Result 315 states and 767 transitions. [2021-06-12 19:36:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:36:18,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:18,871 INFO L225 Difference]: With dead ends: 315 [2021-06-12 19:36:18,871 INFO L226 Difference]: Without dead ends: 308 [2021-06-12 19:36:18,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:36:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-12 19:36:18,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 196. [2021-06-12 19:36:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.933333333333333) internal successors, (572), 195 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 572 transitions. [2021-06-12 19:36:18,874 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 572 transitions. Word has length 17 [2021-06-12 19:36:18,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:18,874 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 572 transitions. [2021-06-12 19:36:18,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 572 transitions. [2021-06-12 19:36:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:18,874 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:18,874 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:19,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-06-12 19:36:19,075 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:19,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:19,075 INFO L82 PathProgramCache]: Analyzing trace with hash 853916706, now seen corresponding path program 70 times [2021-06-12 19:36:19,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:19,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398328141] [2021-06-12 19:36:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:19,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:19,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398328141] [2021-06-12 19:36:19,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398328141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:19,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101211666] [2021-06-12 19:36:19,112 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 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 [2021-06-12 19:36:19,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:19,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:19,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:19,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101211666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:19,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:19,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:19,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549537273] [2021-06-12 19:36:19,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:19,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:19,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:19,170 INFO L87 Difference]: Start difference. First operand 196 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:19,254 INFO L93 Difference]: Finished difference Result 233 states and 626 transitions. [2021-06-12 19:36:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:36:19,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:19,255 INFO L225 Difference]: With dead ends: 233 [2021-06-12 19:36:19,255 INFO L226 Difference]: Without dead ends: 229 [2021-06-12 19:36:19,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-12 19:36:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 198. [2021-06-12 19:36:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9035532994923856) internal successors, (572), 197 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 572 transitions. [2021-06-12 19:36:19,258 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 572 transitions. Word has length 17 [2021-06-12 19:36:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:19,258 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 572 transitions. [2021-06-12 19:36:19,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 572 transitions. [2021-06-12 19:36:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:19,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:19,258 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:19,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-12 19:36:19,473 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash 192652923, now seen corresponding path program 71 times [2021-06-12 19:36:19,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:19,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908568075] [2021-06-12 19:36:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:19,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:19,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908568075] [2021-06-12 19:36:19,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908568075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:19,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169461432] [2021-06-12 19:36:19,503 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 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 [2021-06-12 19:36:19,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169461432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:19,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:19,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173428338] [2021-06-12 19:36:19,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:19,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:19,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:19,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:19,557 INFO L87 Difference]: Start difference. First operand 198 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:19,606 INFO L93 Difference]: Finished difference Result 310 states and 743 transitions. [2021-06-12 19:36:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:36:19,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:19,607 INFO L225 Difference]: With dead ends: 310 [2021-06-12 19:36:19,607 INFO L226 Difference]: Without dead ends: 310 [2021-06-12 19:36:19,608 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-12 19:36:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 188. [2021-06-12 19:36:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.855614973262032) internal successors, (534), 187 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 534 transitions. [2021-06-12 19:36:19,610 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 534 transitions. Word has length 17 [2021-06-12 19:36:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:19,610 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 534 transitions. [2021-06-12 19:36:19,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 534 transitions. [2021-06-12 19:36:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:19,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:19,611 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:19,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1058,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:19,821 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:19,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2007436600, now seen corresponding path program 72 times [2021-06-12 19:36:19,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:19,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198715219] [2021-06-12 19:36:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:19,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:19,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198715219] [2021-06-12 19:36:19,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198715219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:19,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506798157] [2021-06-12 19:36:19,850 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 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 [2021-06-12 19:36:19,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:36:19,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:19,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:19,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506798157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:19,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:19,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:19,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129672629] [2021-06-12 19:36:19,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:19,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:19,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:19,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:19,900 INFO L87 Difference]: Start difference. First operand 188 states and 534 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:19,966 INFO L93 Difference]: Finished difference Result 256 states and 671 transitions. [2021-06-12 19:36:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:36:19,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:19,967 INFO L225 Difference]: With dead ends: 256 [2021-06-12 19:36:19,967 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:36:19,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:36:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:36:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-06-12 19:36:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8469387755102042) internal successors, (558), 196 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 558 transitions. [2021-06-12 19:36:19,979 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 558 transitions. Word has length 17 [2021-06-12 19:36:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:19,979 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 558 transitions. [2021-06-12 19:36:19,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 558 transitions. [2021-06-12 19:36:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:19,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:19,979 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:20,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-06-12 19:36:20,195 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1330351301, now seen corresponding path program 73 times [2021-06-12 19:36:20,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:20,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620761058] [2021-06-12 19:36:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:20,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:20,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620761058] [2021-06-12 19:36:20,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620761058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:20,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818477982] [2021-06-12 19:36:20,222 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 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 [2021-06-12 19:36:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:20,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:20,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818477982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:20,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:20,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:36:20,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739201264] [2021-06-12 19:36:20,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:20,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:20,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:20,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:20,273 INFO L87 Difference]: Start difference. First operand 197 states and 558 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:20,330 INFO L93 Difference]: Finished difference Result 333 states and 786 transitions. [2021-06-12 19:36:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:36:20,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:20,331 INFO L225 Difference]: With dead ends: 333 [2021-06-12 19:36:20,331 INFO L226 Difference]: Without dead ends: 333 [2021-06-12 19:36:20,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:36:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-12 19:36:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 199. [2021-06-12 19:36:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8535353535353534) internal successors, (565), 198 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 565 transitions. [2021-06-12 19:36:20,334 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 565 transitions. Word has length 17 [2021-06-12 19:36:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:20,334 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 565 transitions. [2021-06-12 19:36:20,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 565 transitions. [2021-06-12 19:36:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:20,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:20,335 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:20,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1060,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:20,549 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash -888152350, now seen corresponding path program 74 times [2021-06-12 19:36:20,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:20,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423663020] [2021-06-12 19:36:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:20,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:20,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423663020] [2021-06-12 19:36:20,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423663020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:20,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206712902] [2021-06-12 19:36:20,585 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 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 [2021-06-12 19:36:20,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:20,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:20,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:20,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206712902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:20,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:20,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:20,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488743541] [2021-06-12 19:36:20,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:20,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:20,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:20,629 INFO L87 Difference]: Start difference. First operand 199 states and 565 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:20,702 INFO L93 Difference]: Finished difference Result 260 states and 680 transitions. [2021-06-12 19:36:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:36:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:20,704 INFO L225 Difference]: With dead ends: 260 [2021-06-12 19:36:20,704 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 19:36:20,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:36:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 19:36:20,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2021-06-12 19:36:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-06-12 19:36:20,707 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-06-12 19:36:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:20,708 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-06-12 19:36:20,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-06-12 19:36:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:20,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:20,708 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:20,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:20,924 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1298841989, now seen corresponding path program 75 times [2021-06-12 19:36:20,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:20,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565879988] [2021-06-12 19:36:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:20,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:20,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565879988] [2021-06-12 19:36:20,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565879988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:20,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642938735] [2021-06-12 19:36:20,955 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 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 [2021-06-12 19:36:20,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:36:20,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:20,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:20,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:21,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642938735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:21,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:21,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:21,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163743333] [2021-06-12 19:36:21,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:21,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:21,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:21,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:21,004 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:21,082 INFO L93 Difference]: Finished difference Result 348 states and 819 transitions. [2021-06-12 19:36:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:36:21,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:21,083 INFO L225 Difference]: With dead ends: 348 [2021-06-12 19:36:21,083 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 19:36:21,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 19:36:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 201. [2021-06-12 19:36:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-06-12 19:36:21,086 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-06-12 19:36:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:21,086 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-06-12 19:36:21,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:21,086 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-06-12 19:36:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:21,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:21,087 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:21,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:21,297 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash 773833464, now seen corresponding path program 76 times [2021-06-12 19:36:21,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:21,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84438396] [2021-06-12 19:36:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:21,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84438396] [2021-06-12 19:36:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84438396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107598680] [2021-06-12 19:36:21,323 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 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 [2021-06-12 19:36:21,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:21,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:21,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:36:21,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107598680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:21,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:21,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 19:36:21,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619599523] [2021-06-12 19:36:21,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:36:21,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:21,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:36:21,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:36:21,381 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:36:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:21,416 INFO L93 Difference]: Finished difference Result 328 states and 825 transitions. [2021-06-12 19:36:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:36:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 [2021-06-12 19:36:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:21,418 INFO L225 Difference]: With dead ends: 328 [2021-06-12 19:36:21,418 INFO L226 Difference]: Without dead ends: 328 [2021-06-12 19:36:21,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-12 19:36:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 216. [2021-06-12 19:36:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.902325581395349) internal successors, (624), 215 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 624 transitions. [2021-06-12 19:36:21,421 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 624 transitions. Word has length 17 [2021-06-12 19:36:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:21,421 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 624 transitions. [2021-06-12 19:36:21,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:36:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 624 transitions. [2021-06-12 19:36:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:21,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:21,421 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:21,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1063 [2021-06-12 19:36:21,637 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash 854963749, now seen corresponding path program 77 times [2021-06-12 19:36:21,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:21,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388677817] [2021-06-12 19:36:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:21,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388677817] [2021-06-12 19:36:21,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388677817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549623127] [2021-06-12 19:36:21,660 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 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 [2021-06-12 19:36:21,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:21,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:21,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:36:21,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549623127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:21,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:21,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 19:36:21,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098848700] [2021-06-12 19:36:21,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:36:21,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:21,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:36:21,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:36:21,722 INFO L87 Difference]: Start difference. First operand 216 states and 624 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:36:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:21,797 INFO L93 Difference]: Finished difference Result 306 states and 770 transitions. [2021-06-12 19:36:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:36:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 [2021-06-12 19:36:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:21,798 INFO L225 Difference]: With dead ends: 306 [2021-06-12 19:36:21,798 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 19:36:21,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:36:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 19:36:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 226. [2021-06-12 19:36:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.92) internal successors, (657), 225 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 657 transitions. [2021-06-12 19:36:21,812 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 657 transitions. Word has length 17 [2021-06-12 19:36:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:21,812 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 657 transitions. [2021-06-12 19:36:21,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-06-12 19:36:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 657 transitions. [2021-06-12 19:36:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:21,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:21,812 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:22,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:22,029 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash -353562629, now seen corresponding path program 78 times [2021-06-12 19:36:22,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:22,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281766331] [2021-06-12 19:36:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:22,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:22,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281766331] [2021-06-12 19:36:22,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281766331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:22,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624692821] [2021-06-12 19:36:22,060 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 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 [2021-06-12 19:36:22,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:36:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:22,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:22,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:22,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624692821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:22,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:22,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:22,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097633622] [2021-06-12 19:36:22,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:22,109 INFO L87 Difference]: Start difference. First operand 226 states and 657 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:22,156 INFO L93 Difference]: Finished difference Result 312 states and 782 transitions. [2021-06-12 19:36:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:36:22,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 [2021-06-12 19:36:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:22,157 INFO L225 Difference]: With dead ends: 312 [2021-06-12 19:36:22,157 INFO L226 Difference]: Without dead ends: 312 [2021-06-12 19:36:22,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:36:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-12 19:36:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 225. [2021-06-12 19:36:22,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.9151785714285716) internal successors, (653), 224 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 653 transitions. [2021-06-12 19:36:22,160 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 653 transitions. Word has length 17 [2021-06-12 19:36:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:22,160 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 653 transitions. [2021-06-12 19:36:22,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:22,160 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 653 transitions. [2021-06-12 19:36:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:22,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:22,161 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:22,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:22,377 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:22,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:22,377 INFO L82 PathProgramCache]: Analyzing trace with hash 594982588, now seen corresponding path program 79 times [2021-06-12 19:36:22,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:22,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894359266] [2021-06-12 19:36:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:22,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:22,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894359266] [2021-06-12 19:36:22,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894359266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:22,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301728156] [2021-06-12 19:36:22,421 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 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 [2021-06-12 19:36:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:22,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:22,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:22,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301728156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:22,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:22,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:22,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277580128] [2021-06-12 19:36:22,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:22,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:22,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:22,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:22,465 INFO L87 Difference]: Start difference. First operand 225 states and 653 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:22,535 INFO L93 Difference]: Finished difference Result 311 states and 814 transitions. [2021-06-12 19:36:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:36:22,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:22,536 INFO L225 Difference]: With dead ends: 311 [2021-06-12 19:36:22,536 INFO L226 Difference]: Without dead ends: 299 [2021-06-12 19:36:22,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:36:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-12 19:36:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2021-06-12 19:36:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-06-12 19:36:22,539 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-06-12 19:36:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:22,539 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-06-12 19:36:22,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:22,539 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-06-12 19:36:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:22,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:22,540 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:22,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-12 19:36:22,741 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:22,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:22,741 INFO L82 PathProgramCache]: Analyzing trace with hash 184292949, now seen corresponding path program 80 times [2021-06-12 19:36:22,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:22,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899734388] [2021-06-12 19:36:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:22,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:22,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899734388] [2021-06-12 19:36:22,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899734388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:22,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193294510] [2021-06-12 19:36:22,784 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 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 [2021-06-12 19:36:22,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:22,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:22,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:22,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:22,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193294510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:22,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:22,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:22,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441744285] [2021-06-12 19:36:22,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:22,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:22,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:22,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:22,832 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:22,914 INFO L93 Difference]: Finished difference Result 338 states and 826 transitions. [2021-06-12 19:36:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:36:22,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:22,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:22,915 INFO L225 Difference]: With dead ends: 338 [2021-06-12 19:36:22,915 INFO L226 Difference]: Without dead ends: 338 [2021-06-12 19:36:22,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-12 19:36:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 227. [2021-06-12 19:36:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-06-12 19:36:22,918 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-06-12 19:36:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:22,918 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-06-12 19:36:22,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-06-12 19:36:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:22,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:22,919 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:23,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-12 19:36:23,129 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash -457096584, now seen corresponding path program 81 times [2021-06-12 19:36:23,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:23,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031908369] [2021-06-12 19:36:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:23,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031908369] [2021-06-12 19:36:23,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031908369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418640180] [2021-06-12 19:36:23,165 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 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 [2021-06-12 19:36:23,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:23,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:23,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:23,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418640180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:23,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:23,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:23,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760579773] [2021-06-12 19:36:23,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:23,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:23,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:23,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:23,215 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:23,291 INFO L93 Difference]: Finished difference Result 329 states and 850 transitions. [2021-06-12 19:36:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:36:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:23,293 INFO L225 Difference]: With dead ends: 329 [2021-06-12 19:36:23,293 INFO L226 Difference]: Without dead ends: 321 [2021-06-12 19:36:23,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-12 19:36:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2021-06-12 19:36:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.878260869565217) internal successors, (662), 230 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 662 transitions. [2021-06-12 19:36:23,296 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 662 transitions. Word has length 17 [2021-06-12 19:36:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:23,296 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 662 transitions. [2021-06-12 19:36:23,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 662 transitions. [2021-06-12 19:36:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:23,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:23,297 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:23,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1068,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:23,509 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash -322053317, now seen corresponding path program 82 times [2021-06-12 19:36:23,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:23,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204120481] [2021-06-12 19:36:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:23,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:23,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204120481] [2021-06-12 19:36:23,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204120481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:23,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451184352] [2021-06-12 19:36:23,549 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 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 [2021-06-12 19:36:23,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:23,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:23,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:23,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:23,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451184352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:23,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:23,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:23,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334644918] [2021-06-12 19:36:23,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:23,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:23,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:23,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:23,601 INFO L87 Difference]: Start difference. First operand 231 states and 662 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:23,719 INFO L93 Difference]: Finished difference Result 375 states and 902 transitions. [2021-06-12 19:36:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:36:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:23,720 INFO L225 Difference]: With dead ends: 375 [2021-06-12 19:36:23,720 INFO L226 Difference]: Without dead ends: 375 [2021-06-12 19:36:23,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:36:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-12 19:36:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 228. [2021-06-12 19:36:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.86784140969163) internal successors, (651), 227 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 651 transitions. [2021-06-12 19:36:23,723 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 651 transitions. Word has length 17 [2021-06-12 19:36:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:23,724 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 651 transitions. [2021-06-12 19:36:23,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 651 transitions. [2021-06-12 19:36:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:23,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:23,724 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:23,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-12 19:36:23,940 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash -493623714, now seen corresponding path program 83 times [2021-06-12 19:36:23,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:23,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027132187] [2021-06-12 19:36:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:23,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:23,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027132187] [2021-06-12 19:36:23,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027132187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:23,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069509610] [2021-06-12 19:36:23,967 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 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 [2021-06-12 19:36:23,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:24,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:24,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069509610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:24,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:24,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:24,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789137856] [2021-06-12 19:36:24,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:24,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:24,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:24,029 INFO L87 Difference]: Start difference. First operand 228 states and 651 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:24,073 INFO L93 Difference]: Finished difference Result 391 states and 994 transitions. [2021-06-12 19:36:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:36:24,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 [2021-06-12 19:36:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:24,074 INFO L225 Difference]: With dead ends: 391 [2021-06-12 19:36:24,074 INFO L226 Difference]: Without dead ends: 391 [2021-06-12 19:36:24,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-12 19:36:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 256. [2021-06-12 19:36:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.9686274509803923) internal successors, (757), 255 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 757 transitions. [2021-06-12 19:36:24,078 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 757 transitions. Word has length 17 [2021-06-12 19:36:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:24,078 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 757 transitions. [2021-06-12 19:36:24,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 757 transitions. [2021-06-12 19:36:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:24,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:24,079 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:24,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-06-12 19:36:24,279 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash -412493429, now seen corresponding path program 84 times [2021-06-12 19:36:24,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:24,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455445033] [2021-06-12 19:36:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:24,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:24,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455445033] [2021-06-12 19:36:24,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455445033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:24,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857775366] [2021-06-12 19:36:24,305 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 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 [2021-06-12 19:36:24,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:36:24,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:24,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:24,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857775366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:24,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:24,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:24,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368626849] [2021-06-12 19:36:24,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:24,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:24,350 INFO L87 Difference]: Start difference. First operand 256 states and 757 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:24,424 INFO L93 Difference]: Finished difference Result 374 states and 958 transitions. [2021-06-12 19:36:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:36:24,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 [2021-06-12 19:36:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:24,425 INFO L225 Difference]: With dead ends: 374 [2021-06-12 19:36:24,425 INFO L226 Difference]: Without dead ends: 372 [2021-06-12 19:36:24,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:36:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-12 19:36:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 269. [2021-06-12 19:36:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.003731343283582) internal successors, (805), 268 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 805 transitions. [2021-06-12 19:36:24,429 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 805 transitions. Word has length 17 [2021-06-12 19:36:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:24,429 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 805 transitions. [2021-06-12 19:36:24,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 805 transitions. [2021-06-12 19:36:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:24,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:24,429 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:24,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:24,637 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:24,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1101103778, now seen corresponding path program 85 times [2021-06-12 19:36:24,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:24,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767467055] [2021-06-12 19:36:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:24,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:24,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767467055] [2021-06-12 19:36:24,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767467055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:24,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929592204] [2021-06-12 19:36:24,672 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 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 [2021-06-12 19:36:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:24,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:24,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929592204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:24,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:24,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:24,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712774947] [2021-06-12 19:36:24,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:24,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:24,715 INFO L87 Difference]: Start difference. First operand 269 states and 805 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:24,797 INFO L93 Difference]: Finished difference Result 394 states and 1025 transitions. [2021-06-12 19:36:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:36:24,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 [2021-06-12 19:36:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:24,798 INFO L225 Difference]: With dead ends: 394 [2021-06-12 19:36:24,798 INFO L226 Difference]: Without dead ends: 392 [2021-06-12 19:36:24,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:36:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-12 19:36:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 269. [2021-06-12 19:36:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0) internal successors, (804), 268 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 804 transitions. [2021-06-12 19:36:24,802 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 804 transitions. Word has length 17 [2021-06-12 19:36:24,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:24,803 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 804 transitions. [2021-06-12 19:36:24,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:24,803 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 804 transitions. [2021-06-12 19:36:24,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:24,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:24,803 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:25,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-06-12 19:36:25,004 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:25,004 INFO L82 PathProgramCache]: Analyzing trace with hash 439839995, now seen corresponding path program 86 times [2021-06-12 19:36:25,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:25,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625017334] [2021-06-12 19:36:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:25,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625017334] [2021-06-12 19:36:25,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625017334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048436194] [2021-06-12 19:36:25,030 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 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 [2021-06-12 19:36:25,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:25,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:25,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048436194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:25,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:25,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:36:25,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183502564] [2021-06-12 19:36:25,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:36:25,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:25,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:36:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:36:25,080 INFO L87 Difference]: Start difference. First operand 269 states and 804 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:25,120 INFO L93 Difference]: Finished difference Result 362 states and 940 transitions. [2021-06-12 19:36:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:36:25,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 [2021-06-12 19:36:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:25,122 INFO L225 Difference]: With dead ends: 362 [2021-06-12 19:36:25,122 INFO L226 Difference]: Without dead ends: 362 [2021-06-12 19:36:25,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-12 19:36:25,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2021-06-12 19:36:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.963709677419355) internal successors, (735), 248 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 735 transitions. [2021-06-12 19:36:25,125 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 735 transitions. Word has length 17 [2021-06-12 19:36:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:25,125 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 735 transitions. [2021-06-12 19:36:25,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-06-12 19:36:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 735 transitions. [2021-06-12 19:36:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:25,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:25,126 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:25,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:25,326 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:25,327 INFO L82 PathProgramCache]: Analyzing trace with hash -672474590, now seen corresponding path program 87 times [2021-06-12 19:36:25,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:25,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948834400] [2021-06-12 19:36:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:25,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:25,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948834400] [2021-06-12 19:36:25,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948834400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:25,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996372994] [2021-06-12 19:36:25,359 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 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 [2021-06-12 19:36:25,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:25,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:25,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:25,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:25,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996372994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:25,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:25,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:25,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411115655] [2021-06-12 19:36:25,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:25,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:25,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:25,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:25,403 INFO L87 Difference]: Start difference. First operand 249 states and 735 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:25,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:25,485 INFO L93 Difference]: Finished difference Result 356 states and 958 transitions. [2021-06-12 19:36:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:36:25,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:25,487 INFO L225 Difference]: With dead ends: 356 [2021-06-12 19:36:25,487 INFO L226 Difference]: Without dead ends: 346 [2021-06-12 19:36:25,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-12 19:36:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 263. [2021-06-12 19:36:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0) internal successors, (786), 262 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 786 transitions. [2021-06-12 19:36:25,490 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 786 transitions. Word has length 17 [2021-06-12 19:36:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:25,490 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 786 transitions. [2021-06-12 19:36:25,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 786 transitions. [2021-06-12 19:36:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:25,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:25,491 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:25,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:25,692 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:25,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1083164229, now seen corresponding path program 88 times [2021-06-12 19:36:25,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142236221] [2021-06-12 19:36:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:25,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:25,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142236221] [2021-06-12 19:36:25,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142236221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:25,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544537221] [2021-06-12 19:36:25,737 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 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 [2021-06-12 19:36:25,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:25,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:25,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:25,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544537221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:25,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:25,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:25,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303530285] [2021-06-12 19:36:25,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:25,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:25,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:25,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:25,786 INFO L87 Difference]: Start difference. First operand 263 states and 786 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:25,851 INFO L93 Difference]: Finished difference Result 358 states and 949 transitions. [2021-06-12 19:36:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:36:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:25,852 INFO L225 Difference]: With dead ends: 358 [2021-06-12 19:36:25,852 INFO L226 Difference]: Without dead ends: 358 [2021-06-12 19:36:25,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:36:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-12 19:36:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 264. [2021-06-12 19:36:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-06-12 19:36:25,856 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 17 [2021-06-12 19:36:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:25,856 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-06-12 19:36:25,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-06-12 19:36:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:25,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:25,856 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:26,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:26,057 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1724553762, now seen corresponding path program 89 times [2021-06-12 19:36:26,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:26,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351856831] [2021-06-12 19:36:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:26,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351856831] [2021-06-12 19:36:26,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351856831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:26,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402313742] [2021-06-12 19:36:26,091 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 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 [2021-06-12 19:36:26,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:26,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:26,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:26,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402313742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:26,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:26,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:26,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911453860] [2021-06-12 19:36:26,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:26,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:26,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:26,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:26,147 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:26,231 INFO L93 Difference]: Finished difference Result 377 states and 1000 transitions. [2021-06-12 19:36:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:36:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:26,233 INFO L225 Difference]: With dead ends: 377 [2021-06-12 19:36:26,233 INFO L226 Difference]: Without dead ends: 369 [2021-06-12 19:36:26,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:36:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-12 19:36:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2021-06-12 19:36:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9923954372623576) internal successors, (787), 263 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 787 transitions. [2021-06-12 19:36:26,236 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 787 transitions. Word has length 17 [2021-06-12 19:36:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:26,236 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 787 transitions. [2021-06-12 19:36:26,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 787 transitions. [2021-06-12 19:36:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:26,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:26,237 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:26,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:26,441 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:26,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:26,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510495, now seen corresponding path program 90 times [2021-06-12 19:36:26,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:26,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066057878] [2021-06-12 19:36:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:26,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:26,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066057878] [2021-06-12 19:36:26,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066057878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:26,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026938449] [2021-06-12 19:36:26,474 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 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 [2021-06-12 19:36:26,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:36:26,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:26,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:26,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026938449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:26,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:26,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:26,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036382698] [2021-06-12 19:36:26,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:26,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:26,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:26,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:26,529 INFO L87 Difference]: Start difference. First operand 264 states and 787 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:26,644 INFO L93 Difference]: Finished difference Result 370 states and 949 transitions. [2021-06-12 19:36:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:36:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:26,648 INFO L225 Difference]: With dead ends: 370 [2021-06-12 19:36:26,648 INFO L226 Difference]: Without dead ends: 370 [2021-06-12 19:36:26,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:36:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-12 19:36:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 258. [2021-06-12 19:36:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-06-12 19:36:26,651 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 17 [2021-06-12 19:36:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:26,651 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-06-12 19:36:26,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:26,655 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-06-12 19:36:26,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:26,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:26,655 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:26,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1077,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:26,872 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:26,872 INFO L82 PathProgramCache]: Analyzing trace with hash 20730274, now seen corresponding path program 91 times [2021-06-12 19:36:26,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:26,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475878098] [2021-06-12 19:36:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:26,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:26,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475878098] [2021-06-12 19:36:26,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475878098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:26,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736115459] [2021-06-12 19:36:26,942 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 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 [2021-06-12 19:36:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:27,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736115459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:27,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:27,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:27,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394274448] [2021-06-12 19:36:27,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:27,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:27,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:27,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:27,011 INFO L87 Difference]: Start difference. First operand 258 states and 769 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:27,063 INFO L93 Difference]: Finished difference Result 319 states and 889 transitions. [2021-06-12 19:36:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:36:27,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:27,064 INFO L225 Difference]: With dead ends: 319 [2021-06-12 19:36:27,064 INFO L226 Difference]: Without dead ends: 309 [2021-06-12 19:36:27,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:36:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-12 19:36:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2021-06-12 19:36:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9883268482490273) internal successors, (768), 257 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 768 transitions. [2021-06-12 19:36:27,073 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 768 transitions. Word has length 17 [2021-06-12 19:36:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:27,073 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 768 transitions. [2021-06-12 19:36:27,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 768 transitions. [2021-06-12 19:36:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:27,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:27,073 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:27,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-06-12 19:36:27,289 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash -106375557, now seen corresponding path program 92 times [2021-06-12 19:36:27,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:27,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462799149] [2021-06-12 19:36:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:27,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:27,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462799149] [2021-06-12 19:36:27,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462799149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:27,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352820979] [2021-06-12 19:36:27,327 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 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 [2021-06-12 19:36:27,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:27,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:27,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:27,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352820979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:27,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:27,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:27,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958628822] [2021-06-12 19:36:27,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:27,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:27,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:27,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:27,410 INFO L87 Difference]: Start difference. First operand 258 states and 768 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:27,536 INFO L93 Difference]: Finished difference Result 377 states and 992 transitions. [2021-06-12 19:36:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:36:27,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:27,537 INFO L225 Difference]: With dead ends: 377 [2021-06-12 19:36:27,537 INFO L226 Difference]: Without dead ends: 377 [2021-06-12 19:36:27,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-12 19:36:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 266. [2021-06-12 19:36:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.9849056603773585) internal successors, (791), 265 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 791 transitions. [2021-06-12 19:36:27,540 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 791 transitions. Word has length 17 [2021-06-12 19:36:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:27,540 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 791 transitions. [2021-06-12 19:36:27,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 791 transitions. [2021-06-12 19:36:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:27,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:27,541 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:27,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-12 19:36:27,741 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1130090568, now seen corresponding path program 93 times [2021-06-12 19:36:27,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:27,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489379836] [2021-06-12 19:36:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:27,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:27,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489379836] [2021-06-12 19:36:27,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489379836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:27,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412236581] [2021-06-12 19:36:27,777 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 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 [2021-06-12 19:36:27,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:36:27,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:27,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:27,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412236581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:27,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:27,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:27,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213074791] [2021-06-12 19:36:27,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:27,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:27,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:27,853 INFO L87 Difference]: Start difference. First operand 266 states and 791 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:27,896 INFO L93 Difference]: Finished difference Result 455 states and 1181 transitions. [2021-06-12 19:36:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:36:27,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:27,897 INFO L225 Difference]: With dead ends: 455 [2021-06-12 19:36:27,897 INFO L226 Difference]: Without dead ends: 455 [2021-06-12 19:36:27,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-12 19:36:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 307. [2021-06-12 19:36:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0784313725490198) internal successors, (942), 306 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 942 transitions. [2021-06-12 19:36:27,901 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 942 transitions. Word has length 17 [2021-06-12 19:36:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:27,901 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 942 transitions. [2021-06-12 19:36:27,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 942 transitions. [2021-06-12 19:36:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:27,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:27,902 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:28,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-06-12 19:36:28,105 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:28,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1048960283, now seen corresponding path program 94 times [2021-06-12 19:36:28,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:28,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575787] [2021-06-12 19:36:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:28,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:28,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575787] [2021-06-12 19:36:28,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:28,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646865928] [2021-06-12 19:36:28,141 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 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 [2021-06-12 19:36:28,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:28,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:28,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:28,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:28,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646865928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:28,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:28,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:28,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882500328] [2021-06-12 19:36:28,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:28,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:28,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:28,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:28,186 INFO L87 Difference]: Start difference. First operand 307 states and 942 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:28,297 INFO L93 Difference]: Finished difference Result 448 states and 1182 transitions. [2021-06-12 19:36:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:36:28,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:28,298 INFO L225 Difference]: With dead ends: 448 [2021-06-12 19:36:28,298 INFO L226 Difference]: Without dead ends: 446 [2021-06-12 19:36:28,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-12 19:36:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-06-12 19:36:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.109717868338558) internal successors, (992), 319 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 992 transitions. [2021-06-12 19:36:28,302 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 992 transitions. Word has length 17 [2021-06-12 19:36:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:28,302 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 992 transitions. [2021-06-12 19:36:28,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 992 transitions. [2021-06-12 19:36:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:28,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:28,303 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:28,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:28,513 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:28,513 INFO L82 PathProgramCache]: Analyzing trace with hash 464636924, now seen corresponding path program 95 times [2021-06-12 19:36:28,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:28,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503517455] [2021-06-12 19:36:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:28,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:28,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503517455] [2021-06-12 19:36:28,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503517455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:28,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260692069] [2021-06-12 19:36:28,559 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 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 [2021-06-12 19:36:28,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:28,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:28,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:28,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260692069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:28,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:28,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:28,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266031717] [2021-06-12 19:36:28,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:28,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:28,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:28,605 INFO L87 Difference]: Start difference. First operand 320 states and 992 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:28,694 INFO L93 Difference]: Finished difference Result 458 states and 1214 transitions. [2021-06-12 19:36:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:36:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:28,695 INFO L225 Difference]: With dead ends: 458 [2021-06-12 19:36:28,695 INFO L226 Difference]: Without dead ends: 456 [2021-06-12 19:36:28,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-12 19:36:28,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 309. [2021-06-12 19:36:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0779220779220777) internal successors, (948), 308 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 948 transitions. [2021-06-12 19:36:28,699 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 948 transitions. Word has length 17 [2021-06-12 19:36:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:28,699 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 948 transitions. [2021-06-12 19:36:28,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 948 transitions. [2021-06-12 19:36:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:28,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:28,700 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:28,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1082,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:28,900 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:28,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash -196626859, now seen corresponding path program 96 times [2021-06-12 19:36:28,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:28,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55878605] [2021-06-12 19:36:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:28,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:28,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55878605] [2021-06-12 19:36:28,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55878605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:28,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517727693] [2021-06-12 19:36:28,940 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 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 [2021-06-12 19:36:28,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:36:28,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:28,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:28,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:28,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517727693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:28,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:28,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:28,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512447469] [2021-06-12 19:36:28,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:28,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:28,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:28,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:28,993 INFO L87 Difference]: Start difference. First operand 309 states and 948 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:29,045 INFO L93 Difference]: Finished difference Result 433 states and 1138 transitions. [2021-06-12 19:36:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:36:29,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:29,046 INFO L225 Difference]: With dead ends: 433 [2021-06-12 19:36:29,046 INFO L226 Difference]: Without dead ends: 433 [2021-06-12 19:36:29,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:36:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-12 19:36:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 312. [2021-06-12 19:36:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0707395498392285) internal successors, (955), 311 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 955 transitions. [2021-06-12 19:36:29,050 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 955 transitions. Word has length 17 [2021-06-12 19:36:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:29,050 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 955 transitions. [2021-06-12 19:36:29,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 955 transitions. [2021-06-12 19:36:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:29,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:29,051 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:29,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-06-12 19:36:29,261 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:29,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1080301240, now seen corresponding path program 97 times [2021-06-12 19:36:29,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:29,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580537062] [2021-06-12 19:36:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:29,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:29,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580537062] [2021-06-12 19:36:29,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580537062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:29,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69545768] [2021-06-12 19:36:29,292 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 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 [2021-06-12 19:36:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:29,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:29,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69545768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:29,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:29,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:29,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051813354] [2021-06-12 19:36:29,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:29,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:29,339 INFO L87 Difference]: Start difference. First operand 312 states and 955 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:29,417 INFO L93 Difference]: Finished difference Result 472 states and 1273 transitions. [2021-06-12 19:36:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:36:29,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:29,418 INFO L225 Difference]: With dead ends: 472 [2021-06-12 19:36:29,418 INFO L226 Difference]: Without dead ends: 468 [2021-06-12 19:36:29,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-12 19:36:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-06-12 19:36:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.071197411003236) internal successors, (949), 309 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 949 transitions. [2021-06-12 19:36:29,422 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 949 transitions. Word has length 17 [2021-06-12 19:36:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:29,422 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 949 transitions. [2021-06-12 19:36:29,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 949 transitions. [2021-06-12 19:36:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:29,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:29,422 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:29,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:29,638 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2037480635, now seen corresponding path program 98 times [2021-06-12 19:36:29,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:29,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94184999] [2021-06-12 19:36:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:29,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:29,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94184999] [2021-06-12 19:36:29,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94184999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:29,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040092745] [2021-06-12 19:36:29,673 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 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 [2021-06-12 19:36:29,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:29,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:29,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:29,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040092745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:29,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:29,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:29,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345076062] [2021-06-12 19:36:29,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:29,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:29,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:29,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:29,720 INFO L87 Difference]: Start difference. First operand 310 states and 949 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:29,774 INFO L93 Difference]: Finished difference Result 407 states and 1107 transitions. [2021-06-12 19:36:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:36:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:29,775 INFO L225 Difference]: With dead ends: 407 [2021-06-12 19:36:29,775 INFO L226 Difference]: Without dead ends: 407 [2021-06-12 19:36:29,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:36:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-12 19:36:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 318. [2021-06-12 19:36:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0757097791798107) internal successors, (975), 317 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 975 transitions. [2021-06-12 19:36:29,779 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 975 transitions. Word has length 17 [2021-06-12 19:36:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:29,779 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 975 transitions. [2021-06-12 19:36:29,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 975 transitions. [2021-06-12 19:36:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:29,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:29,780 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:29,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:29,980 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1308941444, now seen corresponding path program 99 times [2021-06-12 19:36:29,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:29,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099963205] [2021-06-12 19:36:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:30,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:30,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099963205] [2021-06-12 19:36:30,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099963205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:30,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622031581] [2021-06-12 19:36:30,017 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 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 [2021-06-12 19:36:30,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:36:30,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:30,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:30,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:30,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622031581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:30,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:30,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:36:30,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859003519] [2021-06-12 19:36:30,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:36:30,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:30,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:36:30,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:36:30,061 INFO L87 Difference]: Start difference. First operand 318 states and 975 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:30,134 INFO L93 Difference]: Finished difference Result 452 states and 1242 transitions. [2021-06-12 19:36:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:36:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 [2021-06-12 19:36:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:30,135 INFO L225 Difference]: With dead ends: 452 [2021-06-12 19:36:30,135 INFO L226 Difference]: Without dead ends: 446 [2021-06-12 19:36:30,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:36:30,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-12 19:36:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 318. [2021-06-12 19:36:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0725552050473186) internal successors, (974), 317 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 974 transitions. [2021-06-12 19:36:30,139 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 974 transitions. Word has length 17 [2021-06-12 19:36:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:30,139 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 974 transitions. [2021-06-12 19:36:30,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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) [2021-06-12 19:36:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 974 transitions. [2021-06-12 19:36:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:30,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:30,140 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:30,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:30,340 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1933946680, now seen corresponding path program 100 times [2021-06-12 19:36:30,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:30,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833385777] [2021-06-12 19:36:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:30,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833385777] [2021-06-12 19:36:30,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833385777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772656907] [2021-06-12 19:36:30,371 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 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 [2021-06-12 19:36:30,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:30,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:30,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:30,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772656907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:30,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:30,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:30,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407440617] [2021-06-12 19:36:30,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:30,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:30,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:30,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:30,425 INFO L87 Difference]: Start difference. First operand 318 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:30,511 INFO L93 Difference]: Finished difference Result 444 states and 1227 transitions. [2021-06-12 19:36:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:36:30,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:30,512 INFO L225 Difference]: With dead ends: 444 [2021-06-12 19:36:30,512 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 19:36:30,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:36:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 19:36:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 332. [2021-06-12 19:36:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.090634441087613) internal successors, (1023), 331 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1023 transitions. [2021-06-12 19:36:30,516 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1023 transitions. Word has length 17 [2021-06-12 19:36:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:30,516 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1023 transitions. [2021-06-12 19:36:30,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1023 transitions. [2021-06-12 19:36:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:30,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:30,517 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:30,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:30,717 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2068989947, now seen corresponding path program 101 times [2021-06-12 19:36:30,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:30,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824062548] [2021-06-12 19:36:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:30,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:30,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824062548] [2021-06-12 19:36:30,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824062548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:30,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766300408] [2021-06-12 19:36:30,753 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 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 [2021-06-12 19:36:30,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:36:30,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:30,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:30,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:30,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766300408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:30,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:30,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:30,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190749020] [2021-06-12 19:36:30,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:30,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:30,806 INFO L87 Difference]: Start difference. First operand 332 states and 1023 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:30,890 INFO L93 Difference]: Finished difference Result 419 states and 1186 transitions. [2021-06-12 19:36:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:36:30,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:30,891 INFO L225 Difference]: With dead ends: 419 [2021-06-12 19:36:30,891 INFO L226 Difference]: Without dead ends: 419 [2021-06-12 19:36:30,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:36:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-12 19:36:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2021-06-12 19:36:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0895953757225434) internal successors, (1069), 346 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1069 transitions. [2021-06-12 19:36:30,895 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1069 transitions. Word has length 17 [2021-06-12 19:36:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:30,895 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1069 transitions. [2021-06-12 19:36:30,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1069 transitions. [2021-06-12 19:36:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:30,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:30,896 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:31,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-06-12 19:36:31,101 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:31,101 INFO L82 PathProgramCache]: Analyzing trace with hash -615736580, now seen corresponding path program 102 times [2021-06-12 19:36:31,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:31,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44934636] [2021-06-12 19:36:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:31,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:31,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44934636] [2021-06-12 19:36:31,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44934636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:31,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220087753] [2021-06-12 19:36:31,141 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 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 [2021-06-12 19:36:31,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:36:31,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:31,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:31,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220087753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:31,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:31,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:31,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417100959] [2021-06-12 19:36:31,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:31,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:31,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:31,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:31,194 INFO L87 Difference]: Start difference. First operand 347 states and 1069 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:31,246 INFO L93 Difference]: Finished difference Result 413 states and 1199 transitions. [2021-06-12 19:36:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:36:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:31,247 INFO L225 Difference]: With dead ends: 413 [2021-06-12 19:36:31,247 INFO L226 Difference]: Without dead ends: 403 [2021-06-12 19:36:31,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:36:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-12 19:36:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 347. [2021-06-12 19:36:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-06-12 19:36:31,250 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-06-12 19:36:31,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:31,251 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-06-12 19:36:31,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:31,251 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-06-12 19:36:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:31,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:31,251 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:31,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-12 19:36:31,461 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash -742842411, now seen corresponding path program 103 times [2021-06-12 19:36:31,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:31,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770249538] [2021-06-12 19:36:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:31,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:31,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770249538] [2021-06-12 19:36:31,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770249538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:31,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386686749] [2021-06-12 19:36:31,508 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 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 [2021-06-12 19:36:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:31,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:31,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:31,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386686749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:31,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:31,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:31,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716568530] [2021-06-12 19:36:31,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:31,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:31,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:31,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:31,561 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:31,661 INFO L93 Difference]: Finished difference Result 418 states and 1194 transitions. [2021-06-12 19:36:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:36:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:31,662 INFO L225 Difference]: With dead ends: 418 [2021-06-12 19:36:31,662 INFO L226 Difference]: Without dead ends: 418 [2021-06-12 19:36:31,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:36:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-12 19:36:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 347. [2021-06-12 19:36:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-06-12 19:36:31,666 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-06-12 19:36:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:31,666 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-06-12 19:36:31,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-06-12 19:36:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:31,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:31,667 INFO L472 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:31,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-06-12 19:36:31,881 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1948460984, now seen corresponding path program 104 times [2021-06-12 19:36:31,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:31,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828719806] [2021-06-12 19:36:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:31,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:31,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828719806] [2021-06-12 19:36:31,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828719806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:31,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534301077] [2021-06-12 19:36:31,914 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 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 [2021-06-12 19:36:31,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:31,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:31,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:31,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:31,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534301077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:31,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:31,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:31,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929764333] [2021-06-12 19:36:31,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:31,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:31,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:31,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:31,963 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:32,004 INFO L93 Difference]: Finished difference Result 411 states and 1195 transitions. [2021-06-12 19:36:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:36:32,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:32,005 INFO L225 Difference]: With dead ends: 411 [2021-06-12 19:36:32,005 INFO L226 Difference]: Without dead ends: 399 [2021-06-12 19:36:32,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:36:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-12 19:36:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 345. [2021-06-12 19:36:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0930232558139537) internal successors, (1064), 344 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1064 transitions. [2021-06-12 19:36:32,009 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1064 transitions. Word has length 17 [2021-06-12 19:36:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:32,009 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1064 transitions. [2021-06-12 19:36:32,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1064 transitions. [2021-06-12 19:36:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:36:32,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:32,010 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:32,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:32,225 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2010299589, now seen corresponding path program 105 times [2021-06-12 19:36:32,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:32,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506106946] [2021-06-12 19:36:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:32,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506106946] [2021-06-12 19:36:32,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506106946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878423984] [2021-06-12 19:36:32,264 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 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 [2021-06-12 19:36:32,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:36:32,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:32,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:36:32,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:32,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878423984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:32,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:32,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:36:32,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067097384] [2021-06-12 19:36:32,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:36:32,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:36:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:36:32,323 INFO L87 Difference]: Start difference. First operand 345 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:32,428 INFO L93 Difference]: Finished difference Result 476 states and 1343 transitions. [2021-06-12 19:36:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:36:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-12 19:36:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:32,429 INFO L225 Difference]: With dead ends: 476 [2021-06-12 19:36:32,429 INFO L226 Difference]: Without dead ends: 476 [2021-06-12 19:36:32,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:36:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-12 19:36:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2021-06-12 19:36:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0819209039548023) internal successors, (1091), 354 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1091 transitions. [2021-06-12 19:36:32,433 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1091 transitions. Word has length 17 [2021-06-12 19:36:32,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:32,433 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1091 transitions. [2021-06-12 19:36:32,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-06-12 19:36:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1091 transitions. [2021-06-12 19:36:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:32,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:32,434 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:32,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:32,634 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:32,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1640906887, now seen corresponding path program 106 times [2021-06-12 19:36:32,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:32,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33682118] [2021-06-12 19:36:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:32,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:32,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33682118] [2021-06-12 19:36:32,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33682118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:32,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369181530] [2021-06-12 19:36:32,727 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 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 [2021-06-12 19:36:32,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:32,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:33,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:33,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:33,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:33,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:33,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:33,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:36:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:33,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369181530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:33,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:33,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:36:33,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760156170] [2021-06-12 19:36:33,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:36:33,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:36:33,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:36:33,317 INFO L87 Difference]: Start difference. First operand 355 states and 1091 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:36:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:33,578 INFO L93 Difference]: Finished difference Result 425 states and 1234 transitions. [2021-06-12 19:36:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:36:33,578 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:36:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:33,579 INFO L225 Difference]: With dead ends: 425 [2021-06-12 19:36:33,579 INFO L226 Difference]: Without dead ends: 398 [2021-06-12 19:36:33,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:36:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-12 19:36:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 369. [2021-06-12 19:36:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.078804347826087) internal successors, (1133), 368 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1133 transitions. [2021-06-12 19:36:33,583 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1133 transitions. Word has length 18 [2021-06-12 19:36:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:33,583 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1133 transitions. [2021-06-12 19:36:33,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:36:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1133 transitions. [2021-06-12 19:36:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:33,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:33,584 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:33,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:33,784 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:33,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1149194617, now seen corresponding path program 107 times [2021-06-12 19:36:33,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:33,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024497464] [2021-06-12 19:36:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:33,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:33,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024497464] [2021-06-12 19:36:33,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024497464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:33,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784526855] [2021-06-12 19:36:33,856 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 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 [2021-06-12 19:36:33,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:36:33,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:33,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:36:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:34,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:34,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:34,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:34,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:34,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:34,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:3 [2021-06-12 19:36:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:34,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784526855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:34,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:34,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:34,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005015060] [2021-06-12 19:36:34,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:34,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:34,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:34,497 INFO L87 Difference]: Start difference. First operand 369 states and 1133 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:34,722 INFO L93 Difference]: Finished difference Result 444 states and 1291 transitions. [2021-06-12 19:36:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:36:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:34,723 INFO L225 Difference]: With dead ends: 444 [2021-06-12 19:36:34,723 INFO L226 Difference]: Without dead ends: 428 [2021-06-12 19:36:34,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-12 19:36:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 384. [2021-06-12 19:36:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-12 19:36:34,727 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-06-12 19:36:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:34,727 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-12 19:36:34,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-12 19:36:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:34,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:34,728 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:34,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1202 [2021-06-12 19:36:34,928 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash -405611257, now seen corresponding path program 108 times [2021-06-12 19:36:34,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:34,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335921045] [2021-06-12 19:36:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:35,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:35,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335921045] [2021-06-12 19:36:35,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335921045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:35,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424906655] [2021-06-12 19:36:35,001 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 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 [2021-06-12 19:36:35,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:36:35,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:35,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:35,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:35,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:35,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:35,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:35,725 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:35,726 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:35,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:35,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:35,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:35,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:35,870 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:35,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:35,871 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:35,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424906655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:35,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:35,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:35,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451293064] [2021-06-12 19:36:35,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:35,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:35,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:35,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:35,906 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:36,226 INFO L93 Difference]: Finished difference Result 463 states and 1333 transitions. [2021-06-12 19:36:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:36:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:36,227 INFO L225 Difference]: With dead ends: 463 [2021-06-12 19:36:36,227 INFO L226 Difference]: Without dead ends: 453 [2021-06-12 19:36:36,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-12 19:36:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2021-06-12 19:36:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-12 19:36:36,232 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-06-12 19:36:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:36,232 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-12 19:36:36,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-12 19:36:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:36,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:36,233 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:36,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:36,444 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:36,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1622768455, now seen corresponding path program 109 times [2021-06-12 19:36:36,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:36,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112029452] [2021-06-12 19:36:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:36,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:36,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112029452] [2021-06-12 19:36:36,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112029452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:36,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165282815] [2021-06-12 19:36:36,515 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 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 [2021-06-12 19:36:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:36,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:36,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:36,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:36,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:36,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:36,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:36:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:36,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165282815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:36,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:36,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:36,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64007033] [2021-06-12 19:36:36,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:36,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:36,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:36,983 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:37,269 INFO L93 Difference]: Finished difference Result 479 states and 1440 transitions. [2021-06-12 19:36:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:36:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:37,270 INFO L225 Difference]: With dead ends: 479 [2021-06-12 19:36:37,270 INFO L226 Difference]: Without dead ends: 463 [2021-06-12 19:36:37,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-12 19:36:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-06-12 19:36:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.146919431279621) internal successors, (1328), 422 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1328 transitions. [2021-06-12 19:36:37,277 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1328 transitions. Word has length 18 [2021-06-12 19:36:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:37,277 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1328 transitions. [2021-06-12 19:36:37,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1328 transitions. [2021-06-12 19:36:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:37,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:37,278 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:37,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1417,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:37,479 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1928615481, now seen corresponding path program 110 times [2021-06-12 19:36:37,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:37,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170650669] [2021-06-12 19:36:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:37,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:37,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170650669] [2021-06-12 19:36:37,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170650669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:37,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657163366] [2021-06-12 19:36:37,577 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 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 [2021-06-12 19:36:37,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:37,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:37,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:37,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:37,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:37,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:38,073 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:38,074 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:38,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:38,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:38,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:38,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:38,482 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:38,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:38,483 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657163366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:38,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:38,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:38,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861049144] [2021-06-12 19:36:38,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:38,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:38,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:38,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:38,508 INFO L87 Difference]: Start difference. First operand 423 states and 1328 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:38,872 INFO L93 Difference]: Finished difference Result 513 states and 1501 transitions. [2021-06-12 19:36:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:36:38,872 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:38,873 INFO L225 Difference]: With dead ends: 513 [2021-06-12 19:36:38,873 INFO L226 Difference]: Without dead ends: 494 [2021-06-12 19:36:38,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:36:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-12 19:36:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 422. [2021-06-12 19:36:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.125890736342043) internal successors, (1316), 421 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1316 transitions. [2021-06-12 19:36:38,878 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1316 transitions. Word has length 18 [2021-06-12 19:36:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:38,878 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1316 transitions. [2021-06-12 19:36:38,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1316 transitions. [2021-06-12 19:36:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:38,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:38,878 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:39,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-12 19:36:39,095 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1077471349, now seen corresponding path program 111 times [2021-06-12 19:36:39,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:39,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616482217] [2021-06-12 19:36:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:39,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:39,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616482217] [2021-06-12 19:36:39,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616482217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:39,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442510311] [2021-06-12 19:36:39,169 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 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 [2021-06-12 19:36:39,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:39,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:39,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:39,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:39,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:39,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:39,789 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:39,789 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:39,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:40,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:40,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:40,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:40,145 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:40,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:40,146 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:40,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442510311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:40,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:40,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:40,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530924854] [2021-06-12 19:36:40,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:40,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:40,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:40,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:40,170 INFO L87 Difference]: Start difference. First operand 422 states and 1316 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:40,488 INFO L93 Difference]: Finished difference Result 479 states and 1433 transitions. [2021-06-12 19:36:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:36:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:40,489 INFO L225 Difference]: With dead ends: 479 [2021-06-12 19:36:40,489 INFO L226 Difference]: Without dead ends: 469 [2021-06-12 19:36:40,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:36:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-12 19:36:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 424. [2021-06-12 19:36:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1252955082742315) internal successors, (1322), 423 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1322 transitions. [2021-06-12 19:36:40,494 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1322 transitions. Word has length 18 [2021-06-12 19:36:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:40,494 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1322 transitions. [2021-06-12 19:36:40,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1322 transitions. [2021-06-12 19:36:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:40,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:40,494 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:40,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:40,695 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:40,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1654277767, now seen corresponding path program 112 times [2021-06-12 19:36:40,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:40,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764996575] [2021-06-12 19:36:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:40,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:40,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764996575] [2021-06-12 19:36:40,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764996575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:40,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678798028] [2021-06-12 19:36:40,768 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 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 [2021-06-12 19:36:40,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:40,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:40,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:41,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:41,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:41,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:41,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:41,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:41,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:36:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:41,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678798028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:41,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:41,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:41,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229324407] [2021-06-12 19:36:41,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:41,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:41,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:41,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:41,255 INFO L87 Difference]: Start difference. First operand 424 states and 1322 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:41,550 INFO L93 Difference]: Finished difference Result 515 states and 1560 transitions. [2021-06-12 19:36:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:36:41,550 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:41,551 INFO L225 Difference]: With dead ends: 515 [2021-06-12 19:36:41,551 INFO L226 Difference]: Without dead ends: 499 [2021-06-12 19:36:41,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-12 19:36:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 458. [2021-06-12 19:36:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1531728665207877) internal successors, (1441), 457 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1441 transitions. [2021-06-12 19:36:41,556 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1441 transitions. Word has length 18 [2021-06-12 19:36:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:41,556 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1441 transitions. [2021-06-12 19:36:41,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1441 transitions. [2021-06-12 19:36:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:41,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:41,557 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:41,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:41,759 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:41,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:41,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1897106169, now seen corresponding path program 113 times [2021-06-12 19:36:41,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:41,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435372465] [2021-06-12 19:36:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:41,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:41,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435372465] [2021-06-12 19:36:41,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435372465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:41,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012060858] [2021-06-12 19:36:41,834 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 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 [2021-06-12 19:36:41,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:36:41,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:41,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:42,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:42,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:42,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:42,531 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:42,531 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:42,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:42,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:42,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:42,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:42,734 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:42,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:42,735 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:42,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012060858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:42,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:42,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:42,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640682688] [2021-06-12 19:36:42,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:42,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:42,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:42,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:42,761 INFO L87 Difference]: Start difference. First operand 458 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:43,323 INFO L93 Difference]: Finished difference Result 583 states and 1699 transitions. [2021-06-12 19:36:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:36:43,323 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:43,324 INFO L225 Difference]: With dead ends: 583 [2021-06-12 19:36:43,324 INFO L226 Difference]: Without dead ends: 557 [2021-06-12 19:36:43,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 367.1ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:36:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-12 19:36:43,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 462. [2021-06-12 19:36:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1496746203904555) internal successors, (1452), 461 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1452 transitions. [2021-06-12 19:36:43,330 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1452 transitions. Word has length 18 [2021-06-12 19:36:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:43,330 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1452 transitions. [2021-06-12 19:36:43,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1452 transitions. [2021-06-12 19:36:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:43,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:43,330 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:43,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-12 19:36:43,545 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:43,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1045962037, now seen corresponding path program 114 times [2021-06-12 19:36:43,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:43,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403321279] [2021-06-12 19:36:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:43,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:43,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403321279] [2021-06-12 19:36:43,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403321279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:43,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750198451] [2021-06-12 19:36:43,617 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 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 [2021-06-12 19:36:43,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:36:43,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:43,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:43,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:43,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:43,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:44,092 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:44,093 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:44,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:44,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:44,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:44,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:44,206 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:44,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:44,207 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:44,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750198451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:44,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:44,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:44,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716574782] [2021-06-12 19:36:44,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:44,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:44,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:44,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:44,231 INFO L87 Difference]: Start difference. First operand 462 states and 1452 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:44,645 INFO L93 Difference]: Finished difference Result 516 states and 1564 transitions. [2021-06-12 19:36:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:36:44,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:44,646 INFO L225 Difference]: With dead ends: 516 [2021-06-12 19:36:44,646 INFO L226 Difference]: Without dead ends: 506 [2021-06-12 19:36:44,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:36:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-12 19:36:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 464. [2021-06-12 19:36:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-06-12 19:36:44,651 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-06-12 19:36:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:44,651 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-06-12 19:36:44,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-06-12 19:36:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:44,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:44,652 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:44,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:44,852 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:44,852 INFO L82 PathProgramCache]: Analyzing trace with hash -430297721, now seen corresponding path program 115 times [2021-06-12 19:36:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:44,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327925912] [2021-06-12 19:36:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:44,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:44,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327925912] [2021-06-12 19:36:44,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327925912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:44,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894882637] [2021-06-12 19:36:44,924 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 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 [2021-06-12 19:36:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:44,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:44,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:45,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:45,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:45,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:45,526 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:45,526 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:45,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:45,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:45,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:45,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:45,626 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:45,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:45,626 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:45,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894882637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:45,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:45,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:45,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123231103] [2021-06-12 19:36:45,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:45,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:45,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:45,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:45,650 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:46,022 INFO L93 Difference]: Finished difference Result 532 states and 1598 transitions. [2021-06-12 19:36:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:36:46,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:46,023 INFO L225 Difference]: With dead ends: 532 [2021-06-12 19:36:46,023 INFO L226 Difference]: Without dead ends: 522 [2021-06-12 19:36:46,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 343.3ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:36:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-12 19:36:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 464. [2021-06-12 19:36:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-06-12 19:36:46,028 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-06-12 19:36:46,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:46,028 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-06-12 19:36:46,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-06-12 19:36:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:46,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:46,029 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:46,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:46,230 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash -486883791, now seen corresponding path program 116 times [2021-06-12 19:36:46,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:46,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140034665] [2021-06-12 19:36:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:36:46,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:46,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140034665] [2021-06-12 19:36:46,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140034665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:46,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166855611] [2021-06-12 19:36:46,302 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 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 [2021-06-12 19:36:46,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:46,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:46,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:46,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:46,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:46,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:46,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:46,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:46,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:36:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:46,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166855611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:46,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:46,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-06-12 19:36:46,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975259595] [2021-06-12 19:36:46,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:36:46,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:36:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:36:46,802 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 20 states, 20 states have (on average 1.5) 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) [2021-06-12 19:36:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:46,948 INFO L93 Difference]: Finished difference Result 485 states and 1487 transitions. [2021-06-12 19:36:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:36:46,949 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) 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 [2021-06-12 19:36:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:46,950 INFO L225 Difference]: With dead ends: 485 [2021-06-12 19:36:46,950 INFO L226 Difference]: Without dead ends: 467 [2021-06-12 19:36:46,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-12 19:36:46,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2021-06-12 19:36:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-06-12 19:36:46,955 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-06-12 19:36:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:46,955 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-06-12 19:36:46,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) 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) [2021-06-12 19:36:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-06-12 19:36:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:46,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:46,955 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:47,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2163,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:47,157 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash -100682677, now seen corresponding path program 117 times [2021-06-12 19:36:47,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:47,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096033573] [2021-06-12 19:36:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:47,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:47,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096033573] [2021-06-12 19:36:47,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096033573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:47,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724779927] [2021-06-12 19:36:47,225 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 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 [2021-06-12 19:36:47,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:36:47,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:47,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:47,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:47,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:47,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:47,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:47,690 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:47,690 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:47,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:48,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:48,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:48,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:48,069 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:48,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:48,070 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:48,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724779927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:48,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:48,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 19:36:48,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431884288] [2021-06-12 19:36:48,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:36:48,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:48,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:36:48,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:36:48,093 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) 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) [2021-06-12 19:36:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:48,415 INFO L93 Difference]: Finished difference Result 544 states and 1603 transitions. [2021-06-12 19:36:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:36:48,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 18 [2021-06-12 19:36:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:48,417 INFO L225 Difference]: With dead ends: 544 [2021-06-12 19:36:48,417 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 19:36:48,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:36:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 19:36:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 464. [2021-06-12 19:36:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-06-12 19:36:48,422 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-06-12 19:36:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:48,422 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-06-12 19:36:48,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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) [2021-06-12 19:36:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-06-12 19:36:48,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:48,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:48,423 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:48,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2246 [2021-06-12 19:36:48,637 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash 437172901, now seen corresponding path program 118 times [2021-06-12 19:36:48,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:48,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199986918] [2021-06-12 19:36:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:48,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:48,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199986918] [2021-06-12 19:36:48,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199986918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:48,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117684475] [2021-06-12 19:36:48,708 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 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 [2021-06-12 19:36:48,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:36:48,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:48,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:48,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:48,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:48,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:49,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:49,243 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:49,243 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:49,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:49,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:49,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:49,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:49,418 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:49,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:49,419 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:49,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117684475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:49,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:49,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:49,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619501146] [2021-06-12 19:36:49,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:49,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:49,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:49,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:49,444 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:49,989 INFO L93 Difference]: Finished difference Result 595 states and 1709 transitions. [2021-06-12 19:36:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:36:49,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:49,990 INFO L225 Difference]: With dead ends: 595 [2021-06-12 19:36:49,990 INFO L226 Difference]: Without dead ends: 566 [2021-06-12 19:36:49,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:36:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-12 19:36:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 455. [2021-06-12 19:36:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.13215859030837) internal successors, (1422), 454 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1422 transitions. [2021-06-12 19:36:49,995 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1422 transitions. Word has length 18 [2021-06-12 19:36:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:49,996 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1422 transitions. [2021-06-12 19:36:49,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1422 transitions. [2021-06-12 19:36:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:49,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:49,996 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:50,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2404,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:50,197 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:50,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1052837217, now seen corresponding path program 119 times [2021-06-12 19:36:50,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:50,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660357365] [2021-06-12 19:36:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:50,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:50,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660357365] [2021-06-12 19:36:50,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660357365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:50,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320179910] [2021-06-12 19:36:50,268 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 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 [2021-06-12 19:36:50,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:36:50,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:50,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 19:36:50,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:50,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:50,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 35 treesize of output 252 [2021-06-12 19:36:52,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:36:52,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:52,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:52,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:52,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:52,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-12 19:36:53,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-12 19:36:53,829 INFO L628 ElimStorePlain]: treesize reduction 40, result has 27.3 percent of original size [2021-06-12 19:36:53,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:53,830 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:15 [2021-06-12 19:36:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:53,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320179910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:53,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:53,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231781477] [2021-06-12 19:36:53,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:53,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:53,854 INFO L87 Difference]: Start difference. First operand 455 states and 1422 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:54,213 INFO L93 Difference]: Finished difference Result 521 states and 1560 transitions. [2021-06-12 19:36:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:36:54,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:54,213 INFO L225 Difference]: With dead ends: 521 [2021-06-12 19:36:54,214 INFO L226 Difference]: Without dead ends: 511 [2021-06-12 19:36:54,214 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:36:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-12 19:36:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 456. [2021-06-12 19:36:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.131868131868132) internal successors, (1425), 455 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1425 transitions. [2021-06-12 19:36:54,218 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1425 transitions. Word has length 18 [2021-06-12 19:36:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:54,218 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1425 transitions. [2021-06-12 19:36:54,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1425 transitions. [2021-06-12 19:36:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:54,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:54,219 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:54,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2515 [2021-06-12 19:36:54,420 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:54,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1663900857, now seen corresponding path program 120 times [2021-06-12 19:36:54,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:54,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228224822] [2021-06-12 19:36:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:54,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:54,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228224822] [2021-06-12 19:36:54,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228224822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:54,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002266399] [2021-06-12 19:36:54,504 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 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 [2021-06-12 19:36:54,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:36:54,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:54,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:54,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:54,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:54,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:54,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:54,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:36:54,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:36:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:54,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002266399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:54,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:54,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356501727] [2021-06-12 19:36:54,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:54,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:54,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:54,886 INFO L87 Difference]: Start difference. First operand 456 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:55,204 INFO L93 Difference]: Finished difference Result 558 states and 1698 transitions. [2021-06-12 19:36:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:36:55,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:55,205 INFO L225 Difference]: With dead ends: 558 [2021-06-12 19:36:55,205 INFO L226 Difference]: Without dead ends: 540 [2021-06-12 19:36:55,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:36:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-12 19:36:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2021-06-12 19:36:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.158316633266533) internal successors, (1576), 499 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1576 transitions. [2021-06-12 19:36:55,211 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1576 transitions. Word has length 18 [2021-06-12 19:36:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:55,211 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1576 transitions. [2021-06-12 19:36:55,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1576 transitions. [2021-06-12 19:36:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:55,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:55,212 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:55,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:36:55,412 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:55,412 INFO L82 PathProgramCache]: Analyzing trace with hash -920317497, now seen corresponding path program 121 times [2021-06-12 19:36:55,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:55,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341916501] [2021-06-12 19:36:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:36:55,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:55,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341916501] [2021-06-12 19:36:55,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341916501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:55,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741923033] [2021-06-12 19:36:55,484 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 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 [2021-06-12 19:36:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:55,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:55,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:55,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:55,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:56,017 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:56,018 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:56,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:56,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:56,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:56,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:56,135 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:56,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:56,135 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:56,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741923033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:56,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:56,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:36:56,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789035864] [2021-06-12 19:36:56,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:36:56,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:56,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:36:56,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:36:56,161 INFO L87 Difference]: Start difference. First operand 500 states and 1576 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:56,737 INFO L93 Difference]: Finished difference Result 647 states and 1895 transitions. [2021-06-12 19:36:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:36:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:36:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:56,739 INFO L225 Difference]: With dead ends: 647 [2021-06-12 19:36:56,739 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 19:36:56,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 412.5ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:36:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 19:36:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 506. [2021-06-12 19:36:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1623762376237625) internal successors, (1597), 505 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1597 transitions. [2021-06-12 19:36:56,744 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1597 transitions. Word has length 18 [2021-06-12 19:36:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:56,745 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1597 transitions. [2021-06-12 19:36:56,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:36:56,745 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1597 transitions. [2021-06-12 19:36:56,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:56,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:56,745 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:56,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3060 [2021-06-12 19:36:56,961 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:56,961 INFO L82 PathProgramCache]: Analyzing trace with hash -69173365, now seen corresponding path program 122 times [2021-06-12 19:36:56,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:56,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175051282] [2021-06-12 19:36:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:57,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:57,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175051282] [2021-06-12 19:36:57,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175051282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:57,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384076126] [2021-06-12 19:36:57,045 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 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 [2021-06-12 19:36:57,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:36:57,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:57,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:57,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:57,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:57,548 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:57,548 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:57,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:57,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:57,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:57,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:57,872 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:57,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:57,872 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:57,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384076126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:57,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:57,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:36:57,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284212792] [2021-06-12 19:36:57,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:36:57,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:36:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:36:57,897 INFO L87 Difference]: Start difference. First operand 506 states and 1597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:36:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:36:58,570 INFO L93 Difference]: Finished difference Result 727 states and 2070 transitions. [2021-06-12 19:36:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:36:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:36:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:36:58,571 INFO L225 Difference]: With dead ends: 727 [2021-06-12 19:36:58,571 INFO L226 Difference]: Without dead ends: 685 [2021-06-12 19:36:58,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 513.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:36:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-12 19:36:58,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 507. [2021-06-12 19:36:58,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:36:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-12 19:36:58,578 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-12 19:36:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:36:58,578 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-12 19:36:58,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:36:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-12 19:36:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:36:58,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:36:58,578 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:36:58,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-06-12 19:36:58,801 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:36:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:36:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash 546490951, now seen corresponding path program 123 times [2021-06-12 19:36:58,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:36:58,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017608990] [2021-06-12 19:36:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:36:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:36:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:58,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:36:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017608990] [2021-06-12 19:36:58,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017608990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582906957] [2021-06-12 19:36:58,882 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 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 [2021-06-12 19:36:58,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:36:58,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:36:58,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:36:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:36:59,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:36:59,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:36:59,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:59,372 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:36:59,373 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:36:59,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:36:59,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:36:59,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:36:59,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:36:59,795 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:36:59,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:36:59,796 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:36:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:36:59,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582906957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:36:59,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:36:59,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:36:59,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826719115] [2021-06-12 19:36:59,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:36:59,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:36:59,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:36:59,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:36:59,819 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:00,216 INFO L93 Difference]: Finished difference Result 598 states and 1790 transitions. [2021-06-12 19:37:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:37:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:00,217 INFO L225 Difference]: With dead ends: 598 [2021-06-12 19:37:00,217 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 19:37:00,217 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:37:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 19:37:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 507. [2021-06-12 19:37:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-12 19:37:00,223 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-12 19:37:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:00,223 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-12 19:37:00,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:00,223 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-12 19:37:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:00,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:00,224 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:00,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-06-12 19:37:00,424 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:00,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1842751733, now seen corresponding path program 124 times [2021-06-12 19:37:00,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:00,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364094187] [2021-06-12 19:37:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:00,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:00,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364094187] [2021-06-12 19:37:00,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364094187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:00,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180782338] [2021-06-12 19:37:00,524 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 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 [2021-06-12 19:37:00,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:37:00,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:00,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:00,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:00,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:00,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:01,031 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:01,031 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:01,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:01,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:01,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:01,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:01,456 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:01,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:01,457 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:01,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180782338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:01,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:01,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:01,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744241784] [2021-06-12 19:37:01,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:01,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:01,481 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:01,918 INFO L93 Difference]: Finished difference Result 608 states and 1810 transitions. [2021-06-12 19:37:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:37:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:01,919 INFO L225 Difference]: With dead ends: 608 [2021-06-12 19:37:01,919 INFO L226 Difference]: Without dead ends: 598 [2021-06-12 19:37:01,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:37:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-12 19:37:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2021-06-12 19:37:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-12 19:37:01,924 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-12 19:37:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:01,924 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-12 19:37:01,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-12 19:37:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:01,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:01,925 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:02,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-06-12 19:37:02,141 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1754340969, now seen corresponding path program 125 times [2021-06-12 19:37:02,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:02,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554971341] [2021-06-12 19:37:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:37:02,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:02,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554971341] [2021-06-12 19:37:02,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554971341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:02,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193871520] [2021-06-12 19:37:02,205 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 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 [2021-06-12 19:37:02,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:37:02,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:02,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:02,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:02,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:02,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:02,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:02,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:37:02,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:37:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:02,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193871520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:02,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:02,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 19:37:02,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940685483] [2021-06-12 19:37:02,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:37:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:37:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:37:02,645 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) 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) [2021-06-12 19:37:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:02,873 INFO L93 Difference]: Finished difference Result 537 states and 1638 transitions. [2021-06-12 19:37:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:37:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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 18 [2021-06-12 19:37:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:02,874 INFO L225 Difference]: With dead ends: 537 [2021-06-12 19:37:02,874 INFO L226 Difference]: Without dead ends: 519 [2021-06-12 19:37:02,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:37:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-12 19:37:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2021-06-12 19:37:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-06-12 19:37:02,879 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-06-12 19:37:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:02,879 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-06-12 19:37:02,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) 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) [2021-06-12 19:37:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-06-12 19:37:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:02,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:02,880 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:03,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-12 19:37:03,090 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:03,090 INFO L82 PathProgramCache]: Analyzing trace with hash -214619961, now seen corresponding path program 126 times [2021-06-12 19:37:03,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:03,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995818307] [2021-06-12 19:37:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:03,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:03,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995818307] [2021-06-12 19:37:03,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995818307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:03,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896072084] [2021-06-12 19:37:03,154 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 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 [2021-06-12 19:37:03,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:37:03,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:03,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:03,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:03,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:03,689 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:03,689 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:03,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:03,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:03,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:03,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:03,817 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:03,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:03,817 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:03,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896072084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:03,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:03,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:03,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367556263] [2021-06-12 19:37:03,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:03,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:03,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:03,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:03,841 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:04,270 INFO L93 Difference]: Finished difference Result 618 states and 1823 transitions. [2021-06-12 19:37:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:37:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:04,271 INFO L225 Difference]: With dead ends: 618 [2021-06-12 19:37:04,271 INFO L226 Difference]: Without dead ends: 608 [2021-06-12 19:37:04,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:37:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-12 19:37:04,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2021-06-12 19:37:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-06-12 19:37:04,277 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-06-12 19:37:04,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:04,277 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-06-12 19:37:04,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:04,277 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-06-12 19:37:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:04,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:04,277 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:04,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-06-12 19:37:04,497 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash -720966227, now seen corresponding path program 127 times [2021-06-12 19:37:04,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:04,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4151743] [2021-06-12 19:37:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:04,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:04,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4151743] [2021-06-12 19:37:04,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4151743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:04,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212767318] [2021-06-12 19:37:04,578 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 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 [2021-06-12 19:37:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:04,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:04,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:04,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:05,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:05,163 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:05,163 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:05,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:05,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:05,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:05,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:05,646 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:05,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:05,647 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:05,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212767318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:05,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:05,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:05,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520092458] [2021-06-12 19:37:05,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:05,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:05,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:05,671 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:06,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:06,256 INFO L93 Difference]: Finished difference Result 681 states and 1975 transitions. [2021-06-12 19:37:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:37:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:06,257 INFO L225 Difference]: With dead ends: 681 [2021-06-12 19:37:06,257 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 19:37:06,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:37:06,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 19:37:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 497. [2021-06-12 19:37:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1330645161290325) internal successors, (1554), 496 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1554 transitions. [2021-06-12 19:37:06,263 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1554 transitions. Word has length 18 [2021-06-12 19:37:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:06,263 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1554 transitions. [2021-06-12 19:37:06,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1554 transitions. [2021-06-12 19:37:06,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:06,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:06,263 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:06,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3742,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:06,464 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1184758385, now seen corresponding path program 128 times [2021-06-12 19:37:06,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:06,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563906978] [2021-06-12 19:37:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:06,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:06,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563906978] [2021-06-12 19:37:06,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563906978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:06,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063232698] [2021-06-12 19:37:06,543 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 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 [2021-06-12 19:37:06,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:37:06,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:06,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:06,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:06,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:06,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:07,064 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:07,065 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:07,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:07,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:07,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:07,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:07,259 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:07,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:07,260 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:07,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063232698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:07,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:07,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:07,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039858281] [2021-06-12 19:37:07,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:07,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:07,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:07,294 INFO L87 Difference]: Start difference. First operand 497 states and 1554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:07,744 INFO L93 Difference]: Finished difference Result 595 states and 1767 transitions. [2021-06-12 19:37:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:37:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:07,745 INFO L225 Difference]: With dead ends: 595 [2021-06-12 19:37:07,745 INFO L226 Difference]: Without dead ends: 585 [2021-06-12 19:37:07,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:37:07,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-12 19:37:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 498. [2021-06-12 19:37:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.132796780684105) internal successors, (1557), 497 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1557 transitions. [2021-06-12 19:37:07,751 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1557 transitions. Word has length 18 [2021-06-12 19:37:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:07,751 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1557 transitions. [2021-06-12 19:37:07,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1557 transitions. [2021-06-12 19:37:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:07,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:07,751 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:07,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:07,967 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:07,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1448223097, now seen corresponding path program 129 times [2021-06-12 19:37:07,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:07,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802493638] [2021-06-12 19:37:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:08,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:08,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802493638] [2021-06-12 19:37:08,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802493638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:08,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259850078] [2021-06-12 19:37:08,046 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 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 [2021-06-12 19:37:08,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:37:08,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:08,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:08,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:08,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:08,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:08,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:08,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:08,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:37:08,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:37:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:08,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259850078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:08,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:08,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:08,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963406417] [2021-06-12 19:37:08,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:08,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:08,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:08,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:08,540 INFO L87 Difference]: Start difference. First operand 498 states and 1557 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:08,804 INFO L93 Difference]: Finished difference Result 613 states and 1879 transitions. [2021-06-12 19:37:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:37:08,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:08,805 INFO L225 Difference]: With dead ends: 613 [2021-06-12 19:37:08,805 INFO L226 Difference]: Without dead ends: 597 [2021-06-12 19:37:08,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:37:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-12 19:37:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 570. [2021-06-12 19:37:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.154657293497364) internal successors, (1795), 569 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1795 transitions. [2021-06-12 19:37:08,830 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1795 transitions. Word has length 18 [2021-06-12 19:37:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:08,830 INFO L482 AbstractCegarLoop]: Abstraction has 570 states and 1795 transitions. [2021-06-12 19:37:08,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1795 transitions. [2021-06-12 19:37:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:08,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:08,830 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:09,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4029 [2021-06-12 19:37:09,033 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash -704639737, now seen corresponding path program 130 times [2021-06-12 19:37:09,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:09,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783421461] [2021-06-12 19:37:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:09,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:09,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783421461] [2021-06-12 19:37:09,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783421461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:09,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570323186] [2021-06-12 19:37:09,104 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 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 [2021-06-12 19:37:09,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:37:09,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:09,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:09,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:09,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:09,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:09,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:09,674 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:09,674 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:09,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:09,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:09,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:09,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:10,007 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:10,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:10,008 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:10,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570323186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:10,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:10,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:10,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125922622] [2021-06-12 19:37:10,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:10,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:10,036 INFO L87 Difference]: Start difference. First operand 570 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:10,754 INFO L93 Difference]: Finished difference Result 700 states and 2080 transitions. [2021-06-12 19:37:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 19:37:10,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:10,755 INFO L225 Difference]: With dead ends: 700 [2021-06-12 19:37:10,755 INFO L226 Difference]: Without dead ends: 676 [2021-06-12 19:37:10,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:37:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-12 19:37:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 573. [2021-06-12 19:37:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1573426573426575) internal successors, (1806), 572 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1806 transitions. [2021-06-12 19:37:10,762 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1806 transitions. Word has length 18 [2021-06-12 19:37:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:10,762 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1806 transitions. [2021-06-12 19:37:10,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1806 transitions. [2021-06-12 19:37:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:10,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:10,763 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:10,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:10,963 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash 146504395, now seen corresponding path program 131 times [2021-06-12 19:37:10,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:10,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864017199] [2021-06-12 19:37:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:37:11,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:11,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864017199] [2021-06-12 19:37:11,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864017199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:11,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576049026] [2021-06-12 19:37:11,037 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 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 [2021-06-12 19:37:11,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:37:11,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:11,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:11,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:11,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:11,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:11,566 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:11,566 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:11,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:11,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:11,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:11,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:11,807 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:11,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:11,807 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:11,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576049026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:11,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:11,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:11,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869913756] [2021-06-12 19:37:11,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:11,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:11,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:11,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:11,832 INFO L87 Difference]: Start difference. First operand 573 states and 1806 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:12,305 INFO L93 Difference]: Finished difference Result 692 states and 2071 transitions. [2021-06-12 19:37:12,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:37:12,305 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:12,306 INFO L225 Difference]: With dead ends: 692 [2021-06-12 19:37:12,306 INFO L226 Difference]: Without dead ends: 682 [2021-06-12 19:37:12,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:37:12,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-12 19:37:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 591. [2021-06-12 19:37:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1627118644067798) internal successors, (1866), 590 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1866 transitions. [2021-06-12 19:37:12,313 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1866 transitions. Word has length 18 [2021-06-12 19:37:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:12,313 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1866 transitions. [2021-06-12 19:37:12,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1866 transitions. [2021-06-12 19:37:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:12,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:12,314 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:12,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:12,521 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:12,521 INFO L82 PathProgramCache]: Analyzing trace with hash 762168711, now seen corresponding path program 132 times [2021-06-12 19:37:12,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:12,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233124636] [2021-06-12 19:37:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:12,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:12,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233124636] [2021-06-12 19:37:12,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233124636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:12,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285484964] [2021-06-12 19:37:12,603 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 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 [2021-06-12 19:37:12,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:37:12,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:12,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:12,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:12,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:12,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:12,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:13,118 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:13,118 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:13,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:13,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:13,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:13,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:13,255 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:13,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:13,256 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:13,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285484964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:13,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:13,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:13,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493248929] [2021-06-12 19:37:13,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:13,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:13,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:13,281 INFO L87 Difference]: Start difference. First operand 591 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:13,885 INFO L93 Difference]: Finished difference Result 752 states and 2200 transitions. [2021-06-12 19:37:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:37:13,885 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:13,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:13,886 INFO L225 Difference]: With dead ends: 752 [2021-06-12 19:37:13,886 INFO L226 Difference]: Without dead ends: 730 [2021-06-12 19:37:13,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 551.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:37:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-12 19:37:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 593. [2021-06-12 19:37:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-12 19:37:13,892 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-12 19:37:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:13,892 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-12 19:37:13,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-12 19:37:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:13,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:13,893 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:14,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4371,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:14,094 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1627073973, now seen corresponding path program 133 times [2021-06-12 19:37:14,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:14,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678512220] [2021-06-12 19:37:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:14,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:14,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678512220] [2021-06-12 19:37:14,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678512220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:14,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307229797] [2021-06-12 19:37:14,177 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 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 [2021-06-12 19:37:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:14,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:14,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:14,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:14,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:14,712 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:14,712 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:14,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:14,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:14,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:14,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:14,912 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:14,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:14,913 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:14,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307229797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:14,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:14,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:14,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062900084] [2021-06-12 19:37:14,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:14,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:14,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:14,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:14,937 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:15,392 INFO L93 Difference]: Finished difference Result 683 states and 2069 transitions. [2021-06-12 19:37:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:37:15,392 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:15,393 INFO L225 Difference]: With dead ends: 683 [2021-06-12 19:37:15,393 INFO L226 Difference]: Without dead ends: 678 [2021-06-12 19:37:15,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:37:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-12 19:37:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 593. [2021-06-12 19:37:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-12 19:37:15,399 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-12 19:37:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:15,399 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-12 19:37:15,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-12 19:37:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:15,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:15,400 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:15,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:15,601 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1615814151, now seen corresponding path program 134 times [2021-06-12 19:37:15,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:15,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479130376] [2021-06-12 19:37:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:15,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:15,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479130376] [2021-06-12 19:37:15,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479130376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:15,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001557668] [2021-06-12 19:37:15,684 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 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 [2021-06-12 19:37:15,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:37:15,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:15,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:15,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:15,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:16,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:16,223 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:16,223 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:16,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:16,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:16,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:16,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:16,332 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:16,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:16,332 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:16,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001557668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:16,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:16,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:16,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955848012] [2021-06-12 19:37:16,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:16,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:16,357 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:16,776 INFO L93 Difference]: Finished difference Result 681 states and 2066 transitions. [2021-06-12 19:37:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:37:16,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:16,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:16,777 INFO L225 Difference]: With dead ends: 681 [2021-06-12 19:37:16,777 INFO L226 Difference]: Without dead ends: 676 [2021-06-12 19:37:16,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:37:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-12 19:37:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 593. [2021-06-12 19:37:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-12 19:37:16,783 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-12 19:37:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:16,783 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-12 19:37:16,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-12 19:37:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:16,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:16,784 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:17,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4596 [2021-06-12 19:37:17,000 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:17,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1904159473, now seen corresponding path program 135 times [2021-06-12 19:37:17,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:17,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296625938] [2021-06-12 19:37:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:17,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:17,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296625938] [2021-06-12 19:37:17,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296625938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:17,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556966696] [2021-06-12 19:37:17,072 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 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 [2021-06-12 19:37:17,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:37:17,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:17,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:17,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:17,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:17,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:17,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:17,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:37:17,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:37:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:17,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556966696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:17,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:17,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:17,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157788804] [2021-06-12 19:37:17,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:17,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:17,471 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:17,764 INFO L93 Difference]: Finished difference Result 630 states and 1927 transitions. [2021-06-12 19:37:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:37:17,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:17,766 INFO L225 Difference]: With dead ends: 630 [2021-06-12 19:37:17,766 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 19:37:17,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:37:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 19:37:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 593. [2021-06-12 19:37:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-06-12 19:37:17,772 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 18 [2021-06-12 19:37:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:17,772 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-06-12 19:37:17,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-06-12 19:37:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:17,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:17,773 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:17,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-06-12 19:37:17,974 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash 548291531, now seen corresponding path program 136 times [2021-06-12 19:37:17,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:17,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845794936] [2021-06-12 19:37:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:18,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:18,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845794936] [2021-06-12 19:37:18,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845794936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:18,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158048070] [2021-06-12 19:37:18,061 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 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 [2021-06-12 19:37:18,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:37:18,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:18,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:18,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:18,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:18,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:18,688 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:18,689 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:18,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:18,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:18,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:18,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:18,886 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:18,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:18,886 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:18,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158048070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:18,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:18,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:18,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631572672] [2021-06-12 19:37:18,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:18,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:18,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:18,910 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:19,469 INFO L93 Difference]: Finished difference Result 747 states and 2217 transitions. [2021-06-12 19:37:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:37:19,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:19,471 INFO L225 Difference]: With dead ends: 747 [2021-06-12 19:37:19,471 INFO L226 Difference]: Without dead ends: 737 [2021-06-12 19:37:19,471 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:37:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-12 19:37:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 599. [2021-06-12 19:37:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1538461538461537) internal successors, (1886), 598 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1886 transitions. [2021-06-12 19:37:19,477 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1886 transitions. Word has length 18 [2021-06-12 19:37:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:19,477 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1886 transitions. [2021-06-12 19:37:19,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1886 transitions. [2021-06-12 19:37:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:19,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:19,478 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:19,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:19,679 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:19,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:19,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2031426469, now seen corresponding path program 137 times [2021-06-12 19:37:19,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:19,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969635466] [2021-06-12 19:37:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:19,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:19,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969635466] [2021-06-12 19:37:19,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969635466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:19,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861142787] [2021-06-12 19:37:19,762 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 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 [2021-06-12 19:37:19,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:37:19,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:19,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:19,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:20,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:20,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:20,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:20,331 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:20,332 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:20,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:20,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:20,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:20,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:20,438 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:20,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:20,438 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:20,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861142787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:20,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:20,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:20,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433035776] [2021-06-12 19:37:20,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:20,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:20,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:20,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:20,472 INFO L87 Difference]: Start difference. First operand 599 states and 1886 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:21,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:21,113 INFO L93 Difference]: Finished difference Result 777 states and 2279 transitions. [2021-06-12 19:37:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:37:21,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:21,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:21,114 INFO L225 Difference]: With dead ends: 777 [2021-06-12 19:37:21,114 INFO L226 Difference]: Without dead ends: 748 [2021-06-12 19:37:21,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 643.2ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:37:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-12 19:37:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 597. [2021-06-12 19:37:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-06-12 19:37:21,121 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-06-12 19:37:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:21,121 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-06-12 19:37:21,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-06-12 19:37:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:21,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:21,122 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:21,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:21,322 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:21,322 INFO L82 PathProgramCache]: Analyzing trace with hash 979347297, now seen corresponding path program 138 times [2021-06-12 19:37:21,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:21,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449066771] [2021-06-12 19:37:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:21,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:21,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449066771] [2021-06-12 19:37:21,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449066771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:21,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633459384] [2021-06-12 19:37:21,417 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 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 [2021-06-12 19:37:21,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:37:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:21,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:21,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:21,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:21,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:21,897 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:21,898 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:21,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:22,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:22,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:22,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:22,142 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:22,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:22,143 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:22,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633459384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:22,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:22,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:22,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872228058] [2021-06-12 19:37:22,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:22,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:22,167 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:22,670 INFO L93 Difference]: Finished difference Result 676 states and 2054 transitions. [2021-06-12 19:37:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:37:22,670 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:22,671 INFO L225 Difference]: With dead ends: 676 [2021-06-12 19:37:22,671 INFO L226 Difference]: Without dead ends: 671 [2021-06-12 19:37:22,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:37:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-12 19:37:22,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2021-06-12 19:37:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-06-12 19:37:22,677 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-06-12 19:37:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:22,677 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-06-12 19:37:22,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-06-12 19:37:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:22,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:22,678 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:22,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4998,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:22,881 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash 942820167, now seen corresponding path program 139 times [2021-06-12 19:37:22,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:22,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506211439] [2021-06-12 19:37:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:22,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:22,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506211439] [2021-06-12 19:37:22,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506211439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:22,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424977487] [2021-06-12 19:37:22,955 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 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 [2021-06-12 19:37:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:22,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:23,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:23,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:23,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:23,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:23,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:37:23,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:37:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:23,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424977487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:23,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:23,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:23,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059565993] [2021-06-12 19:37:23,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:23,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:23,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:23,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:23,334 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:23,561 INFO L93 Difference]: Finished difference Result 707 states and 2181 transitions. [2021-06-12 19:37:23,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:37:23,562 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:23,563 INFO L225 Difference]: With dead ends: 707 [2021-06-12 19:37:23,563 INFO L226 Difference]: Without dead ends: 691 [2021-06-12 19:37:23,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:37:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-12 19:37:23,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 667. [2021-06-12 19:37:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.165165165165165) internal successors, (2108), 666 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2108 transitions. [2021-06-12 19:37:23,569 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2108 transitions. Word has length 18 [2021-06-12 19:37:23,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:23,569 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2108 transitions. [2021-06-12 19:37:23,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2108 transitions. [2021-06-12 19:37:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:23,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:23,570 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:23,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5114,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:23,771 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:23,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:23,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1686403527, now seen corresponding path program 140 times [2021-06-12 19:37:23,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:23,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546759773] [2021-06-12 19:37:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:23,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:23,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546759773] [2021-06-12 19:37:23,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546759773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:23,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604803185] [2021-06-12 19:37:23,843 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 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 [2021-06-12 19:37:23,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:37:23,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:23,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:23,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:24,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:24,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:24,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:24,454 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:24,454 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:24,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:24,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:24,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:24,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:24,646 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:24,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:24,646 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:24,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604803185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:24,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:24,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:24,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984275251] [2021-06-12 19:37:24,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:24,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:24,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:24,672 INFO L87 Difference]: Start difference. First operand 667 states and 2108 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:25,313 INFO L93 Difference]: Finished difference Result 772 states and 2340 transitions. [2021-06-12 19:37:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:37:25,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:25,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:25,314 INFO L225 Difference]: With dead ends: 772 [2021-06-12 19:37:25,314 INFO L226 Difference]: Without dead ends: 762 [2021-06-12 19:37:25,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:37:25,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-12 19:37:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 670. [2021-06-12 19:37:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1689088191330343) internal successors, (2120), 669 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2120 transitions. [2021-06-12 19:37:25,321 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2120 transitions. Word has length 18 [2021-06-12 19:37:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:25,321 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 2120 transitions. [2021-06-12 19:37:25,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2120 transitions. [2021-06-12 19:37:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:25,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:25,322 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:25,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5168 [2021-06-12 19:37:25,523 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:25,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1757419637, now seen corresponding path program 141 times [2021-06-12 19:37:25,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:25,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106613291] [2021-06-12 19:37:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:25,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:25,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106613291] [2021-06-12 19:37:25,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106613291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:25,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890432014] [2021-06-12 19:37:25,599 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 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 [2021-06-12 19:37:25,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:37:25,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:25,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:25,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:25,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:25,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:26,083 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:26,083 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:26,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:26,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:26,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:26,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:26,286 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:26,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:26,287 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:26,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890432014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:26,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:26,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:26,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801377838] [2021-06-12 19:37:26,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:26,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:26,310 INFO L87 Difference]: Start difference. First operand 670 states and 2120 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:26,889 INFO L93 Difference]: Finished difference Result 788 states and 2394 transitions. [2021-06-12 19:37:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:37:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:26,890 INFO L225 Difference]: With dead ends: 788 [2021-06-12 19:37:26,890 INFO L226 Difference]: Without dead ends: 778 [2021-06-12 19:37:26,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:37:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-06-12 19:37:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 695. [2021-06-12 19:37:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.1714697406340058) internal successors, (2201), 694 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2201 transitions. [2021-06-12 19:37:26,897 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2201 transitions. Word has length 18 [2021-06-12 19:37:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:26,897 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2201 transitions. [2021-06-12 19:37:26,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2201 transitions. [2021-06-12 19:37:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:26,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:26,898 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:27,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5316 [2021-06-12 19:37:27,099 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1141755321, now seen corresponding path program 142 times [2021-06-12 19:37:27,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:27,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861307293] [2021-06-12 19:37:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:37:27,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861307293] [2021-06-12 19:37:27,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861307293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416139906] [2021-06-12 19:37:27,176 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 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 [2021-06-12 19:37:27,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:37:27,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:27,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:27,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:27,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:27,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:27,714 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:27,715 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:27,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:27,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:27,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:27,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:27,837 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:27,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:27,838 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:27,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416139906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:27,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:27,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:27,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979308091] [2021-06-12 19:37:27,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:27,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:27,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:27,861 INFO L87 Difference]: Start difference. First operand 695 states and 2201 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:28,294 INFO L93 Difference]: Finished difference Result 836 states and 2495 transitions. [2021-06-12 19:37:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:37:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:28,296 INFO L225 Difference]: With dead ends: 836 [2021-06-12 19:37:28,296 INFO L226 Difference]: Without dead ends: 826 [2021-06-12 19:37:28,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:37:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-12 19:37:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 705. [2021-06-12 19:37:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.171875) internal successors, (2233), 704 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2233 transitions. [2021-06-12 19:37:28,303 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2233 transitions. Word has length 18 [2021-06-12 19:37:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:28,303 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2233 transitions. [2021-06-12 19:37:28,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2233 transitions. [2021-06-12 19:37:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:28,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:28,304 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:28,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5417,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:28,504 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash 763969291, now seen corresponding path program 143 times [2021-06-12 19:37:28,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:28,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069280666] [2021-06-12 19:37:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:28,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:28,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069280666] [2021-06-12 19:37:28,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069280666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:28,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314992603] [2021-06-12 19:37:28,586 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 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 [2021-06-12 19:37:28,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:37:28,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:28,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:28,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:28,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:28,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:28,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:29,052 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:29,053 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:29,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:29,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:29,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:29,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:29,375 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:29,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:29,376 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:29,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314992603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:29,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:29,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:29,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507535691] [2021-06-12 19:37:29,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:29,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:29,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:29,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:29,400 INFO L87 Difference]: Start difference. First operand 705 states and 2233 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:30,088 INFO L93 Difference]: Finished difference Result 890 states and 2620 transitions. [2021-06-12 19:37:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:37:30,088 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:30,090 INFO L225 Difference]: With dead ends: 890 [2021-06-12 19:37:30,090 INFO L226 Difference]: Without dead ends: 868 [2021-06-12 19:37:30,090 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 636.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:37:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-12 19:37:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 705. [2021-06-12 19:37:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-12 19:37:30,099 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-12 19:37:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:30,099 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-12 19:37:30,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-12 19:37:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:30,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:30,100 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:30,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5511,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:30,300 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:30,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:30,300 INFO L82 PathProgramCache]: Analyzing trace with hash -288109881, now seen corresponding path program 144 times [2021-06-12 19:37:30,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:30,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629200194] [2021-06-12 19:37:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:30,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:30,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629200194] [2021-06-12 19:37:30,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629200194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:30,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129605903] [2021-06-12 19:37:30,381 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 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 [2021-06-12 19:37:30,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:37:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:30,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:30,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:30,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:30,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:31,039 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:31,040 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:31,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:31,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:31,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:31,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:31,158 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:31,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:31,159 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:31,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129605903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:31,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:31,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:31,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425863613] [2021-06-12 19:37:31,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:31,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:31,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:31,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:31,183 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:31,662 INFO L93 Difference]: Finished difference Result 803 states and 2447 transitions. [2021-06-12 19:37:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:37:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:31,664 INFO L225 Difference]: With dead ends: 803 [2021-06-12 19:37:31,664 INFO L226 Difference]: Without dead ends: 798 [2021-06-12 19:37:31,664 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:37:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-06-12 19:37:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 705. [2021-06-12 19:37:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-12 19:37:31,677 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-12 19:37:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:31,677 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-12 19:37:31,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-12 19:37:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:31,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:31,678 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:31,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5650 [2021-06-12 19:37:31,879 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:31,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1457174155, now seen corresponding path program 145 times [2021-06-12 19:37:31,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:31,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579213746] [2021-06-12 19:37:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:31,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:31,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579213746] [2021-06-12 19:37:31,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579213746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:31,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549972685] [2021-06-12 19:37:31,963 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 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 [2021-06-12 19:37:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:31,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:32,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:32,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:32,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:32,639 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:32,639 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:32,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:32,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:32,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:32,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:32,775 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:32,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:32,776 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:32,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549972685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:32,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:32,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:32,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167103773] [2021-06-12 19:37:32,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:32,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:32,800 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:33,315 INFO L93 Difference]: Finished difference Result 813 states and 2474 transitions. [2021-06-12 19:37:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:37:33,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:33,317 INFO L225 Difference]: With dead ends: 813 [2021-06-12 19:37:33,317 INFO L226 Difference]: Without dead ends: 808 [2021-06-12 19:37:33,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:37:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-12 19:37:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 705. [2021-06-12 19:37:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-12 19:37:33,324 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-12 19:37:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:33,324 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-12 19:37:33,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-12 19:37:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:33,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:33,325 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:33,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5778,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:33,527 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:33,527 INFO L82 PathProgramCache]: Analyzing trace with hash -646443817, now seen corresponding path program 146 times [2021-06-12 19:37:33,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:33,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060512464] [2021-06-12 19:37:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:33,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:33,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060512464] [2021-06-12 19:37:33,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060512464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:33,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696644577] [2021-06-12 19:37:33,608 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 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 [2021-06-12 19:37:33,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:37:33,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:33,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:33,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:33,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:33,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:34,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:34,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:34,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:37:34,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:37:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:34,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696644577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:34,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:34,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:34,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397544749] [2021-06-12 19:37:34,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:34,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:34,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:34,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:34,024 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:34,287 INFO L93 Difference]: Finished difference Result 751 states and 2311 transitions. [2021-06-12 19:37:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:37:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:34,288 INFO L225 Difference]: With dead ends: 751 [2021-06-12 19:37:34,288 INFO L226 Difference]: Without dead ends: 733 [2021-06-12 19:37:34,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:37:34,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-12 19:37:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 705. [2021-06-12 19:37:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-06-12 19:37:34,295 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-06-12 19:37:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:34,295 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-06-12 19:37:34,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-06-12 19:37:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:34,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:34,296 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:34,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-06-12 19:37:34,497 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:34,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:34,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1571255993, now seen corresponding path program 147 times [2021-06-12 19:37:34,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:34,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100532279] [2021-06-12 19:37:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:34,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:34,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100532279] [2021-06-12 19:37:34,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100532279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:34,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810264633] [2021-06-12 19:37:34,577 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 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 [2021-06-12 19:37:34,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:37:34,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:34,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:34,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:34,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:35,064 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:35,069 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:35,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:35,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:35,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:35,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:35,481 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:35,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:35,482 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:35,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810264633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:35,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:35,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:35,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577838674] [2021-06-12 19:37:35,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:35,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:35,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:35,506 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:36,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:36,187 INFO L93 Difference]: Finished difference Result 846 states and 2546 transitions. [2021-06-12 19:37:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:37:36,188 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:36,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:36,189 INFO L225 Difference]: With dead ends: 846 [2021-06-12 19:37:36,189 INFO L226 Difference]: Without dead ends: 836 [2021-06-12 19:37:36,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:37:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-12 19:37:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 705. [2021-06-12 19:37:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-06-12 19:37:36,196 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-06-12 19:37:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:36,196 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-06-12 19:37:36,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-06-12 19:37:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:36,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:36,197 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:36,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5997,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:36,397 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:36,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1456254125, now seen corresponding path program 148 times [2021-06-12 19:37:36,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:36,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263384235] [2021-06-12 19:37:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:36,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:36,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263384235] [2021-06-12 19:37:36,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263384235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:36,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694048361] [2021-06-12 19:37:36,482 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 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 [2021-06-12 19:37:36,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:37:36,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:36,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:36,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:36,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:36,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:36,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:37,124 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:37,124 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:37,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:37,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:37,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:37,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:37,338 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:37,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:37,339 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:37,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694048361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:37,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:37,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:37,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189600185] [2021-06-12 19:37:37,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:37,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:37,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:37,363 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:38,128 INFO L93 Difference]: Finished difference Result 871 states and 2573 transitions. [2021-06-12 19:37:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:37:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:38,129 INFO L225 Difference]: With dead ends: 871 [2021-06-12 19:37:38,129 INFO L226 Difference]: Without dead ends: 856 [2021-06-12 19:37:38,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 718.9ms TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 19:37:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-12 19:37:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 706. [2021-06-12 19:37:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-06-12 19:37:38,137 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-06-12 19:37:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:38,137 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-06-12 19:37:38,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-06-12 19:37:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:38,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:38,138 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:38,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6137,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:38,339 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:38,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:38,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1093429135, now seen corresponding path program 149 times [2021-06-12 19:37:38,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:38,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118134152] [2021-06-12 19:37:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:38,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:38,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118134152] [2021-06-12 19:37:38,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118134152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:38,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375096302] [2021-06-12 19:37:38,419 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 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 [2021-06-12 19:37:38,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:37:38,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:38,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:38,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:38,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:38,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:38,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:38,929 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:38,929 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:38,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:39,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:39,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:39,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:39,111 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:39,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:39,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:39,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375096302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:39,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:39,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:39,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963263308] [2021-06-12 19:37:39,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:39,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:39,135 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:39,711 INFO L93 Difference]: Finished difference Result 805 states and 2457 transitions. [2021-06-12 19:37:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:37:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:39,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:39,713 INFO L225 Difference]: With dead ends: 805 [2021-06-12 19:37:39,713 INFO L226 Difference]: Without dead ends: 800 [2021-06-12 19:37:39,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 575.7ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:37:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-12 19:37:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 706. [2021-06-12 19:37:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-06-12 19:37:39,720 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-06-12 19:37:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:39,720 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-06-12 19:37:39,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-06-12 19:37:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:39,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:39,721 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:39,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6299 [2021-06-12 19:37:39,921 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:39,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2050717319, now seen corresponding path program 150 times [2021-06-12 19:37:39,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:39,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94776027] [2021-06-12 19:37:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:40,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:40,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94776027] [2021-06-12 19:37:40,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94776027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:40,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413705326] [2021-06-12 19:37:40,003 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 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 [2021-06-12 19:37:40,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:37:40,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:40,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:40,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:40,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:40,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:40,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:40,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:37:40,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-12 19:37:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:40,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413705326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:40,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:40,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:40,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410222710] [2021-06-12 19:37:40,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:40,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:40,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:40,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:40,376 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:40,650 INFO L93 Difference]: Finished difference Result 817 states and 2547 transitions. [2021-06-12 19:37:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:37:40,650 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:40,651 INFO L225 Difference]: With dead ends: 817 [2021-06-12 19:37:40,651 INFO L226 Difference]: Without dead ends: 803 [2021-06-12 19:37:40,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:37:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-06-12 19:37:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 780. [2021-06-12 19:37:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.184852374839538) internal successors, (2481), 779 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2481 transitions. [2021-06-12 19:37:40,659 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2481 transitions. Word has length 18 [2021-06-12 19:37:40,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:40,659 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2481 transitions. [2021-06-12 19:37:40,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:40,659 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2481 transitions. [2021-06-12 19:37:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:40,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:40,660 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:40,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6402,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:40,861 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1500666617, now seen corresponding path program 151 times [2021-06-12 19:37:40,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:40,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807608174] [2021-06-12 19:37:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:40,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:40,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807608174] [2021-06-12 19:37:40,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807608174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:40,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524366493] [2021-06-12 19:37:40,935 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 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 [2021-06-12 19:37:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:40,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:40,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:41,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:41,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:41,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:41,564 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:41,565 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:41,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:41,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:41,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:41,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:41,816 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:41,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:41,817 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:41,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524366493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:41,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:41,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:41,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194415156] [2021-06-12 19:37:41,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:41,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:41,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:41,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:41,843 INFO L87 Difference]: Start difference. First operand 780 states and 2481 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:42,525 INFO L93 Difference]: Finished difference Result 881 states and 2702 transitions. [2021-06-12 19:37:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 19:37:42,526 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:42,527 INFO L225 Difference]: With dead ends: 881 [2021-06-12 19:37:42,527 INFO L226 Difference]: Without dead ends: 871 [2021-06-12 19:37:42,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:37:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-06-12 19:37:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 783. [2021-06-12 19:37:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.187979539641944) internal successors, (2493), 782 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2493 transitions. [2021-06-12 19:37:42,535 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2493 transitions. Word has length 18 [2021-06-12 19:37:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:42,535 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2493 transitions. [2021-06-12 19:37:42,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2493 transitions. [2021-06-12 19:37:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:42,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:42,536 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:42,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6446,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:42,749 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash -649522485, now seen corresponding path program 152 times [2021-06-12 19:37:42,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:42,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53267114] [2021-06-12 19:37:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:42,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:42,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53267114] [2021-06-12 19:37:42,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53267114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:42,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553691192] [2021-06-12 19:37:42,825 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 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 [2021-06-12 19:37:42,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:37:42,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:42,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:42,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:43,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:43,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:43,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:43,416 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:43,416 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:43,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:43,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:43,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:43,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:43,714 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:43,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:43,715 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553691192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:43,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:43,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510010544] [2021-06-12 19:37:43,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:43,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:43,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:43,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:43,739 INFO L87 Difference]: Start difference. First operand 783 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:44,382 INFO L93 Difference]: Finished difference Result 914 states and 2779 transitions. [2021-06-12 19:37:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:37:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:44,384 INFO L225 Difference]: With dead ends: 914 [2021-06-12 19:37:44,384 INFO L226 Difference]: Without dead ends: 904 [2021-06-12 19:37:44,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:37:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-12 19:37:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 808. [2021-06-12 19:37:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.195786864931846) internal successors, (2579), 807 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2579 transitions. [2021-06-12 19:37:44,392 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2579 transitions. Word has length 18 [2021-06-12 19:37:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:44,392 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2579 transitions. [2021-06-12 19:37:44,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2579 transitions. [2021-06-12 19:37:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:44,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:44,393 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:44,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6564 [2021-06-12 19:37:44,593 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:44,594 INFO L82 PathProgramCache]: Analyzing trace with hash -33858169, now seen corresponding path program 153 times [2021-06-12 19:37:44,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:44,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379876164] [2021-06-12 19:37:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:44,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:44,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379876164] [2021-06-12 19:37:44,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379876164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:44,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060586710] [2021-06-12 19:37:44,661 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 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 [2021-06-12 19:37:44,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:37:44,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:44,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:44,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:45,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:45,231 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:45,231 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:45,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:45,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:45,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:45,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:45,351 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:45,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:45,351 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:45,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060586710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:45,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:45,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:45,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470643655] [2021-06-12 19:37:45,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:45,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:45,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:45,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:45,375 INFO L87 Difference]: Start difference. First operand 808 states and 2579 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:46,037 INFO L93 Difference]: Finished difference Result 960 states and 2894 transitions. [2021-06-12 19:37:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:37:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:46,038 INFO L225 Difference]: With dead ends: 960 [2021-06-12 19:37:46,038 INFO L226 Difference]: Without dead ends: 950 [2021-06-12 19:37:46,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:37:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-12 19:37:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2021-06-12 19:37:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.1956521739130435) internal successors, (2646), 828 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2646 transitions. [2021-06-12 19:37:46,047 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2646 transitions. Word has length 18 [2021-06-12 19:37:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:46,047 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2646 transitions. [2021-06-12 19:37:46,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2646 transitions. [2021-06-12 19:37:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:46,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:46,048 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:46,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6715,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:46,253 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1871866443, now seen corresponding path program 154 times [2021-06-12 19:37:46,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:46,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358292616] [2021-06-12 19:37:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:37:46,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358292616] [2021-06-12 19:37:46,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358292616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014860729] [2021-06-12 19:37:46,325 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 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 [2021-06-12 19:37:46,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:37:46,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:46,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:46,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:46,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:46,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:46,836 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:46,836 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:46,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:47,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:47,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:47,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:47,133 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:47,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:47,134 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:47,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014860729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:47,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:47,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 19:37:47,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830382668] [2021-06-12 19:37:47,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:37:47,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:37:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:37:47,157 INFO L87 Difference]: Start difference. First operand 829 states and 2646 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:47,728 INFO L93 Difference]: Finished difference Result 966 states and 2916 transitions. [2021-06-12 19:37:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:37:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 18 [2021-06-12 19:37:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:47,730 INFO L225 Difference]: With dead ends: 966 [2021-06-12 19:37:47,730 INFO L226 Difference]: Without dead ends: 951 [2021-06-12 19:37:47,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:37:47,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-12 19:37:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 835. [2021-06-12 19:37:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-12 19:37:47,739 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-12 19:37:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:47,739 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-12 19:37:47,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:37:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-12 19:37:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:47,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:47,740 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:47,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6814,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:47,941 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:47,941 INFO L82 PathProgramCache]: Analyzing trace with hash 819787271, now seen corresponding path program 155 times [2021-06-12 19:37:47,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:47,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682905065] [2021-06-12 19:37:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:48,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:48,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682905065] [2021-06-12 19:37:48,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682905065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:48,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467915961] [2021-06-12 19:37:48,028 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 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 [2021-06-12 19:37:48,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:37:48,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:48,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:48,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:48,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:48,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:48,592 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:48,592 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:48,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:48,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:48,728 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:48,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:48,741 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:48,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:48,741 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:48,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467915961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:48,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:48,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:48,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054575078] [2021-06-12 19:37:48,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:48,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:48,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:48,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:48,766 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:49,487 INFO L93 Difference]: Finished difference Result 1010 states and 3017 transitions. [2021-06-12 19:37:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:37:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:49,488 INFO L225 Difference]: With dead ends: 1010 [2021-06-12 19:37:49,489 INFO L226 Difference]: Without dead ends: 995 [2021-06-12 19:37:49,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:37:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-12 19:37:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 835. [2021-06-12 19:37:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-12 19:37:49,497 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-12 19:37:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:49,497 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-12 19:37:49,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:49,497 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-12 19:37:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:49,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:49,498 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:49,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6954 [2021-06-12 19:37:49,714 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1729895989, now seen corresponding path program 156 times [2021-06-12 19:37:49,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:49,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589946204] [2021-06-12 19:37:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:49,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:49,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589946204] [2021-06-12 19:37:49,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589946204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:49,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701585409] [2021-06-12 19:37:49,796 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 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 [2021-06-12 19:37:49,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:37:49,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:50,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:50,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:50,478 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:50,478 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:50,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:50,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:50,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:50,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:50,644 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:50,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:50,644 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:50,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701585409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:50,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:50,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:50,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114862469] [2021-06-12 19:37:50,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:50,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:50,669 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:51,246 INFO L93 Difference]: Finished difference Result 964 states and 2957 transitions. [2021-06-12 19:37:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:37:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:51,247 INFO L225 Difference]: With dead ends: 964 [2021-06-12 19:37:51,248 INFO L226 Difference]: Without dead ends: 959 [2021-06-12 19:37:51,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 605.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:37:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-06-12 19:37:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 835. [2021-06-12 19:37:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-12 19:37:51,256 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-12 19:37:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:51,256 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-12 19:37:51,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-12 19:37:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:37:51,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:51,257 INFO L472 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:51,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7060,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:51,458 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:51,458 INFO L82 PathProgramCache]: Analyzing trace with hash 834301575, now seen corresponding path program 157 times [2021-06-12 19:37:51,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:51,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914583708] [2021-06-12 19:37:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:51,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:51,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914583708] [2021-06-12 19:37:51,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914583708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:51,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203193164] [2021-06-12 19:37:51,538 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 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 [2021-06-12 19:37:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:37:51,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:51,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:51,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-12 19:37:51,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:52,097 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-12 19:37:52,097 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-12 19:37:52,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-12 19:37:52,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:37:52,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:37:52,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:52,346 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:37:52,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:37:52,347 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-12 19:37:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:52,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203193164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:52,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:52,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 19:37:52,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310290872] [2021-06-12 19:37:52,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:37:52,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:52,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:37:52,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:37:52,371 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:52,928 INFO L93 Difference]: Finished difference Result 980 states and 3003 transitions. [2021-06-12 19:37:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:37:52,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-12 19:37:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:52,929 INFO L225 Difference]: With dead ends: 980 [2021-06-12 19:37:52,929 INFO L226 Difference]: Without dead ends: 975 [2021-06-12 19:37:52,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 617.9ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:37:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-12 19:37:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 837. [2021-06-12 19:37:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.187799043062201) internal successors, (2665), 836 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2665 transitions. [2021-06-12 19:37:52,938 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2665 transitions. Word has length 18 [2021-06-12 19:37:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:52,938 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2665 transitions. [2021-06-12 19:37:52,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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) [2021-06-12 19:37:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2665 transitions. [2021-06-12 19:37:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:37:52,939 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:52,939 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:53,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7192,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:53,139 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:53,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1301661189, now seen corresponding path program 158 times [2021-06-12 19:37:53,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:53,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329255607] [2021-06-12 19:37:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:53,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:53,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329255607] [2021-06-12 19:37:53,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329255607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:53,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269896164] [2021-06-12 19:37:53,252 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 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 [2021-06-12 19:37:53,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:37:53,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:53,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:37:53,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:53,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:53,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:37:54,120 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2021-06-12 19:37:54,968 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 264 [2021-06-12 19:37:55,076 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 274 [2021-06-12 19:37:55,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:55,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:55,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:37:55,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:37:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:55,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269896164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:55,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:55,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:37:55,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127034886] [2021-06-12 19:37:55,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:37:55,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:55,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:37:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:37:55,312 INFO L87 Difference]: Start difference. First operand 837 states and 2665 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:37:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:55,599 INFO L93 Difference]: Finished difference Result 905 states and 2785 transitions. [2021-06-12 19:37:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:37:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:37:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:55,601 INFO L225 Difference]: With dead ends: 905 [2021-06-12 19:37:55,601 INFO L226 Difference]: Without dead ends: 883 [2021-06-12 19:37:55,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:37:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-12 19:37:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 840. [2021-06-12 19:37:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1835518474374256) internal successors, (2671), 839 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2671 transitions. [2021-06-12 19:37:55,609 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2671 transitions. Word has length 19 [2021-06-12 19:37:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:55,609 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2671 transitions. [2021-06-12 19:37:55,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:37:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2671 transitions. [2021-06-12 19:37:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:37:55,610 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:55,610 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:55,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7314,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:55,811 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:55,811 INFO L82 PathProgramCache]: Analyzing trace with hash -649128821, now seen corresponding path program 159 times [2021-06-12 19:37:55,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:55,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541494098] [2021-06-12 19:37:55,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:55,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:55,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541494098] [2021-06-12 19:37:55,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541494098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:55,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349892434] [2021-06-12 19:37:55,951 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 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 [2021-06-12 19:37:55,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:37:55,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:55,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 19:37:55,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:56,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:56,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:37:56,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:56,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:56,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:37:56,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:37:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:56,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349892434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:56,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:56,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:37:56,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579418171] [2021-06-12 19:37:56,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:37:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:37:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:37:56,720 INFO L87 Difference]: Start difference. First operand 840 states and 2671 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:37:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:57,175 INFO L93 Difference]: Finished difference Result 899 states and 2774 transitions. [2021-06-12 19:37:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:37:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:37:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:57,177 INFO L225 Difference]: With dead ends: 899 [2021-06-12 19:37:57,177 INFO L226 Difference]: Without dead ends: 880 [2021-06-12 19:37:57,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:37:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-06-12 19:37:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 842. [2021-06-12 19:37:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.1712247324613556) internal successors, (2667), 841 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2667 transitions. [2021-06-12 19:37:57,187 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2667 transitions. Word has length 19 [2021-06-12 19:37:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:57,187 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2667 transitions. [2021-06-12 19:37:57,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:37:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2667 transitions. [2021-06-12 19:37:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:37:57,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:57,188 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:57,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7594,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:37:57,404 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:57,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:57,404 INFO L82 PathProgramCache]: Analyzing trace with hash 203204603, now seen corresponding path program 160 times [2021-06-12 19:37:57,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:57,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712124856] [2021-06-12 19:37:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:57,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:57,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712124856] [2021-06-12 19:37:57,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712124856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:57,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4190391] [2021-06-12 19:37:57,537 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 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 [2021-06-12 19:37:57,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:37:57,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:57,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:37:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:57,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:57,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:37:58,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:37:58,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:58,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:37:58,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:37:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:58,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4190391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:58,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:37:58,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:37:58,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943423478] [2021-06-12 19:37:58,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:37:58,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:37:58,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:37:58,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:37:58,584 INFO L87 Difference]: Start difference. First operand 842 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:37:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:37:58,921 INFO L93 Difference]: Finished difference Result 889 states and 2752 transitions. [2021-06-12 19:37:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:37:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:37:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:37:58,922 INFO L225 Difference]: With dead ends: 889 [2021-06-12 19:37:58,922 INFO L226 Difference]: Without dead ends: 878 [2021-06-12 19:37:58,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:37:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-12 19:37:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 843. [2021-06-12 19:37:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.16270783847981) internal successors, (2663), 842 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:37:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2663 transitions. [2021-06-12 19:37:58,931 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2663 transitions. Word has length 19 [2021-06-12 19:37:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:37:58,931 INFO L482 AbstractCegarLoop]: Abstraction has 843 states and 2663 transitions. [2021-06-12 19:37:58,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:37:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2663 transitions. [2021-06-12 19:37:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:37:58,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:37:58,932 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:37:59,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7704 [2021-06-12 19:37:59,132 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:37:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:37:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash 946787963, now seen corresponding path program 161 times [2021-06-12 19:37:59,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:37:59,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435155883] [2021-06-12 19:37:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:37:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:37:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:37:59,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:37:59,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435155883] [2021-06-12 19:37:59,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435155883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:37:59,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853274239] [2021-06-12 19:37:59,250 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 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 [2021-06-12 19:37:59,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:37:59,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:37:59,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:37:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:37:59,595 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 19:37:59,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:37:59,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:01,087 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 210 [2021-06-12 19:38:01,988 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 258 [2021-06-12 19:38:02,135 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 277 [2021-06-12 19:38:02,324 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 302 [2021-06-12 19:38:02,682 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 419 [2021-06-12 19:38:03,164 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-06-12 19:38:03,701 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-06-12 19:38:04,237 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 526 [2021-06-12 19:38:04,438 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 236 [2021-06-12 19:38:05,472 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-06-12 19:38:05,595 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-06-12 19:38:05,727 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 214 [2021-06-12 19:38:05,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:06,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:06,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:06,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:06,282 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:06,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:06,283 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:06,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853274239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:06,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:06,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:38:06,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403530780] [2021-06-12 19:38:06,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:38:06,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:06,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:38:06,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:38:06,313 INFO L87 Difference]: Start difference. First operand 843 states and 2663 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:38:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:06,714 INFO L93 Difference]: Finished difference Result 922 states and 2811 transitions. [2021-06-12 19:38:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:38:06,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:38:06,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:06,716 INFO L225 Difference]: With dead ends: 922 [2021-06-12 19:38:06,716 INFO L226 Difference]: Without dead ends: 910 [2021-06-12 19:38:06,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:38:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-12 19:38:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 839. [2021-06-12 19:38:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.1658711217183773) internal successors, (2653), 838 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2653 transitions. [2021-06-12 19:38:06,724 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2653 transitions. Word has length 19 [2021-06-12 19:38:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:06,724 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2653 transitions. [2021-06-12 19:38:06,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:38:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2653 transitions. [2021-06-12 19:38:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:06,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:06,725 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:06,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7885 [2021-06-12 19:38:06,926 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:06,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:06,926 INFO L82 PathProgramCache]: Analyzing trace with hash 274927871, now seen corresponding path program 162 times [2021-06-12 19:38:06,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:06,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295178911] [2021-06-12 19:38:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:07,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:07,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295178911] [2021-06-12 19:38:07,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295178911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:07,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537957849] [2021-06-12 19:38:07,034 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 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 [2021-06-12 19:38:07,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:38:07,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:07,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:07,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:07,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:07,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:08,401 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-06-12 19:38:08,593 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-06-12 19:38:08,835 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 435 [2021-06-12 19:38:09,651 WARN L205 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 488 [2021-06-12 19:38:09,857 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 323 [2021-06-12 19:38:11,178 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 330 [2021-06-12 19:38:11,291 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 283 [2021-06-12 19:38:12,492 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 479 [2021-06-12 19:38:12,977 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-06-12 19:38:13,456 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-06-12 19:38:13,981 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 634 [2021-06-12 19:38:14,415 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 534 [2021-06-12 19:38:15,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:15,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:15,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:15,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:15,854 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:15,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:15,854 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:15,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537957849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:15,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:15,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:38:15,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940175935] [2021-06-12 19:38:15,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:38:15,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:15,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:38:15,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:38:15,882 INFO L87 Difference]: Start difference. First operand 839 states and 2653 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:16,368 INFO L93 Difference]: Finished difference Result 960 states and 2881 transitions. [2021-06-12 19:38:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:38:16,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:38:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:16,369 INFO L225 Difference]: With dead ends: 960 [2021-06-12 19:38:16,369 INFO L226 Difference]: Without dead ends: 946 [2021-06-12 19:38:16,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:38:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-12 19:38:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 844. [2021-06-12 19:38:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1589561091340452) internal successors, (2663), 843 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2663 transitions. [2021-06-12 19:38:16,378 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2663 transitions. Word has length 19 [2021-06-12 19:38:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:16,378 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2663 transitions. [2021-06-12 19:38:16,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2663 transitions. [2021-06-12 19:38:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:16,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:16,379 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:16,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8577 [2021-06-12 19:38:16,580 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:16,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:16,580 INFO L82 PathProgramCache]: Analyzing trace with hash -386335912, now seen corresponding path program 163 times [2021-06-12 19:38:16,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:16,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979880934] [2021-06-12 19:38:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:16,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:16,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979880934] [2021-06-12 19:38:16,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979880934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:16,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986748762] [2021-06-12 19:38:16,619 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 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 [2021-06-12 19:38:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:38:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:16,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986748762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:16,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:16,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:38:16,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187859054] [2021-06-12 19:38:16,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:38:16,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:16,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:38:16,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:38:16,672 INFO L87 Difference]: Start difference. First operand 844 states and 2663 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:38:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:16,723 INFO L93 Difference]: Finished difference Result 1106 states and 3133 transitions. [2021-06-12 19:38:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:38:16,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 [2021-06-12 19:38:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:16,724 INFO L225 Difference]: With dead ends: 1106 [2021-06-12 19:38:16,724 INFO L226 Difference]: Without dead ends: 1106 [2021-06-12 19:38:16,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:38:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-12 19:38:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 852. [2021-06-12 19:38:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1656874265569916) internal successors, (2694), 851 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2694 transitions. [2021-06-12 19:38:16,734 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2694 transitions. Word has length 19 [2021-06-12 19:38:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:16,734 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2694 transitions. [2021-06-12 19:38:16,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:38:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2694 transitions. [2021-06-12 19:38:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:16,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:16,735 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:16,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9440,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:38:16,953 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:16,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1288290309, now seen corresponding path program 164 times [2021-06-12 19:38:16,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:16,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383191960] [2021-06-12 19:38:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:38:17,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:17,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383191960] [2021-06-12 19:38:17,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383191960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:17,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110325226] [2021-06-12 19:38:17,045 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 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 [2021-06-12 19:38:17,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:38:17,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:17,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:17,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:17,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:17,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:17,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:17,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:17,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:38:17,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:38:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:17,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110325226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:17,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:17,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:38:17,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026389507] [2021-06-12 19:38:17,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:38:17,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:17,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:38:17,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:38:17,752 INFO L87 Difference]: Start difference. First operand 852 states and 2694 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:38:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:18,048 INFO L93 Difference]: Finished difference Result 911 states and 2818 transitions. [2021-06-12 19:38:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:38:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 19 [2021-06-12 19:38:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:18,049 INFO L225 Difference]: With dead ends: 911 [2021-06-12 19:38:18,049 INFO L226 Difference]: Without dead ends: 900 [2021-06-12 19:38:18,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:38:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-06-12 19:38:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 856. [2021-06-12 19:38:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.160233918128655) internal successors, (2702), 855 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2702 transitions. [2021-06-12 19:38:18,058 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2702 transitions. Word has length 19 [2021-06-12 19:38:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:18,058 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2702 transitions. [2021-06-12 19:38:18,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:38:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2702 transitions. [2021-06-12 19:38:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:18,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:18,059 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:18,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9441 [2021-06-12 19:38:18,273 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash -544706949, now seen corresponding path program 165 times [2021-06-12 19:38:18,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:18,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048640880] [2021-06-12 19:38:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:38:18,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:18,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048640880] [2021-06-12 19:38:18,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048640880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:18,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348083230] [2021-06-12 19:38:18,365 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 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 [2021-06-12 19:38:18,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:38:18,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:18,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:18,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:18,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:18,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:20,040 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 334 [2021-06-12 19:38:21,192 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 443 [2021-06-12 19:38:21,538 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-06-12 19:38:21,883 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-06-12 19:38:22,265 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 470 [2021-06-12 19:38:22,697 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 525 [2021-06-12 19:38:23,023 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 504 [2021-06-12 19:38:23,599 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 288 [2021-06-12 19:38:23,776 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-06-12 19:38:23,960 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-06-12 19:38:24,079 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 223 [2021-06-12 19:38:24,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:24,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:24,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:24,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:24,638 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:24,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:24,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:24,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348083230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:24,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:24,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:38:24,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373781407] [2021-06-12 19:38:24,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:38:24,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:24,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:38:24,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:38:24,667 INFO L87 Difference]: Start difference. First operand 856 states and 2702 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:38:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:25,089 INFO L93 Difference]: Finished difference Result 946 states and 2880 transitions. [2021-06-12 19:38:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:38:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 19 [2021-06-12 19:38:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:25,096 INFO L225 Difference]: With dead ends: 946 [2021-06-12 19:38:25,097 INFO L226 Difference]: Without dead ends: 936 [2021-06-12 19:38:25,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:38:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-12 19:38:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 858. [2021-06-12 19:38:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.156359393232205) internal successors, (2705), 857 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2705 transitions. [2021-06-12 19:38:25,105 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2705 transitions. Word has length 19 [2021-06-12 19:38:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:25,105 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2705 transitions. [2021-06-12 19:38:25,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:38:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2705 transitions. [2021-06-12 19:38:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:25,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:25,106 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:25,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9533 [2021-06-12 19:38:25,307 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash 306437183, now seen corresponding path program 166 times [2021-06-12 19:38:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:25,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206733251] [2021-06-12 19:38:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:25,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206733251] [2021-06-12 19:38:25,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206733251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894528815] [2021-06-12 19:38:25,433 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 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 [2021-06-12 19:38:25,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:38:25,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:25,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:25,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:25,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:27,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:27,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:27,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:28,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:28,409 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:28,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:28,409 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:28,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894528815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:28,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:28,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:38:28,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234367365] [2021-06-12 19:38:28,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:38:28,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:28,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:38:28,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:38:28,438 INFO L87 Difference]: Start difference. First operand 858 states and 2705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:28,985 INFO L93 Difference]: Finished difference Result 1017 states and 3020 transitions. [2021-06-12 19:38:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:38:28,985 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:38:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:28,987 INFO L225 Difference]: With dead ends: 1017 [2021-06-12 19:38:28,987 INFO L226 Difference]: Without dead ends: 1005 [2021-06-12 19:38:28,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:38:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-12 19:38:28,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 867. [2021-06-12 19:38:28,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.147806004618938) internal successors, (2726), 866 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2726 transitions. [2021-06-12 19:38:28,996 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2726 transitions. Word has length 19 [2021-06-12 19:38:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:28,996 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2726 transitions. [2021-06-12 19:38:28,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2726 transitions. [2021-06-12 19:38:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:28,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:28,997 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:29,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10224 [2021-06-12 19:38:29,198 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:29,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:29,198 INFO L82 PathProgramCache]: Analyzing trace with hash 922101499, now seen corresponding path program 167 times [2021-06-12 19:38:29,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:29,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579846307] [2021-06-12 19:38:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:29,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:29,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579846307] [2021-06-12 19:38:29,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579846307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:29,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239240807] [2021-06-12 19:38:29,294 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 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 [2021-06-12 19:38:29,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:38:29,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:29,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:29,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:29,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:29,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:30,224 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 323 [2021-06-12 19:38:30,333 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-06-12 19:38:30,448 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-06-12 19:38:30,581 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 344 [2021-06-12 19:38:30,741 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 379 [2021-06-12 19:38:30,878 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 336 [2021-06-12 19:38:31,989 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-06-12 19:38:32,148 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-06-12 19:38:32,283 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 277 [2021-06-12 19:38:32,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:32,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:32,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:33,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:33,310 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:33,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:33,310 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:33,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239240807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:33,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:33,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:38:33,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955319432] [2021-06-12 19:38:33,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:38:33,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:38:33,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:38:33,338 INFO L87 Difference]: Start difference. First operand 867 states and 2726 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:34,011 INFO L93 Difference]: Finished difference Result 1037 states and 3076 transitions. [2021-06-12 19:38:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:38:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:38:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:34,013 INFO L225 Difference]: With dead ends: 1037 [2021-06-12 19:38:34,013 INFO L226 Difference]: Without dead ends: 1021 [2021-06-12 19:38:34,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 550.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:38:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-12 19:38:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 884. [2021-06-12 19:38:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.1540203850509627) internal successors, (2785), 883 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2785 transitions. [2021-06-12 19:38:34,022 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2785 transitions. Word has length 19 [2021-06-12 19:38:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:34,022 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2785 transitions. [2021-06-12 19:38:34,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2785 transitions. [2021-06-12 19:38:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:34,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:34,024 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:34,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10615 [2021-06-12 19:38:34,224 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:34,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:34,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1879280894, now seen corresponding path program 168 times [2021-06-12 19:38:34,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:34,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243951205] [2021-06-12 19:38:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:34,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243951205] [2021-06-12 19:38:34,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243951205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:34,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474583875] [2021-06-12 19:38:34,262 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 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 [2021-06-12 19:38:34,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:38:34,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:38:34,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:34,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474583875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:34,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:34,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:38:34,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166484023] [2021-06-12 19:38:34,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:38:34,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:34,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:38:34,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:38:34,318 INFO L87 Difference]: Start difference. First operand 884 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:38:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:34,395 INFO L93 Difference]: Finished difference Result 1214 states and 3399 transitions. [2021-06-12 19:38:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:38:34,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 [2021-06-12 19:38:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:34,397 INFO L225 Difference]: With dead ends: 1214 [2021-06-12 19:38:34,397 INFO L226 Difference]: Without dead ends: 1214 [2021-06-12 19:38:34,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:38:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-12 19:38:34,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 897. [2021-06-12 19:38:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.1595982142857144) internal successors, (2831), 896 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2831 transitions. [2021-06-12 19:38:34,406 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2831 transitions. Word has length 19 [2021-06-12 19:38:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:34,406 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2831 transitions. [2021-06-12 19:38:34,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:38:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2831 transitions. [2021-06-12 19:38:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:34,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:34,407 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:34,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11027 [2021-06-12 19:38:34,608 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:34,608 INFO L82 PathProgramCache]: Analyzing trace with hash -311501637, now seen corresponding path program 169 times [2021-06-12 19:38:34,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:34,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831886687] [2021-06-12 19:38:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:34,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:34,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831886687] [2021-06-12 19:38:34,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831886687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:34,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544293858] [2021-06-12 19:38:34,722 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 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 [2021-06-12 19:38:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:34,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:34,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:35,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:35,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:36,259 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-06-12 19:38:36,386 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-06-12 19:38:36,517 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 269 [2021-06-12 19:38:36,628 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 267 [2021-06-12 19:38:36,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:36,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:36,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:38:36,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:38:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:36,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544293858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:36,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:36,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:38:36,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086067276] [2021-06-12 19:38:36,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:38:36,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:36,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:38:36,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:38:36,816 INFO L87 Difference]: Start difference. First operand 897 states and 2831 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:37,195 INFO L93 Difference]: Finished difference Result 956 states and 2950 transitions. [2021-06-12 19:38:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:38:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:38:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:37,197 INFO L225 Difference]: With dead ends: 956 [2021-06-12 19:38:37,197 INFO L226 Difference]: Without dead ends: 943 [2021-06-12 19:38:37,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:38:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-12 19:38:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 899. [2021-06-12 19:38:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-06-12 19:38:37,206 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-06-12 19:38:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:37,206 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-06-12 19:38:37,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-06-12 19:38:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:37,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:37,207 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:37,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11028 [2021-06-12 19:38:37,423 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:37,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:37,423 INFO L82 PathProgramCache]: Analyzing trace with hash 432081723, now seen corresponding path program 170 times [2021-06-12 19:38:37,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:37,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767453799] [2021-06-12 19:38:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:38:37,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:37,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767453799] [2021-06-12 19:38:37,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767453799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:37,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124097640] [2021-06-12 19:38:37,515 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 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 [2021-06-12 19:38:37,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:38:37,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:37,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:37,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:37,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:38,292 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 246 [2021-06-12 19:38:39,319 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 297 [2021-06-12 19:38:39,483 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 341 [2021-06-12 19:38:39,718 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-06-12 19:38:39,946 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-06-12 19:38:40,206 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 395 [2021-06-12 19:38:40,483 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 447 [2021-06-12 19:38:41,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:41,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:41,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:41,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:41,957 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:41,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:41,957 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:41,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124097640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:41,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:41,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:38:41,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864447667] [2021-06-12 19:38:41,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:38:41,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:41,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:38:41,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:38:41,985 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:38:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:42,386 INFO L93 Difference]: Finished difference Result 1019 states and 3082 transitions. [2021-06-12 19:38:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:38:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 19 [2021-06-12 19:38:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:42,388 INFO L225 Difference]: With dead ends: 1019 [2021-06-12 19:38:42,388 INFO L226 Difference]: Without dead ends: 1009 [2021-06-12 19:38:42,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:38:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-12 19:38:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 899. [2021-06-12 19:38:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-06-12 19:38:42,397 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-06-12 19:38:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:42,397 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-06-12 19:38:42,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:38:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-06-12 19:38:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:42,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:42,398 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:42,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11323 [2021-06-12 19:38:42,599 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:42,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1283225855, now seen corresponding path program 171 times [2021-06-12 19:38:42,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:42,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332952630] [2021-06-12 19:38:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:42,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:42,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332952630] [2021-06-12 19:38:42,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332952630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:42,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353243489] [2021-06-12 19:38:42,702 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 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 [2021-06-12 19:38:42,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:38:42,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:42,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:42,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:43,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:43,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:44,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:44,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:44,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:44,502 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:44,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:44,502 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:44,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353243489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:44,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:44,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:38:44,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54912275] [2021-06-12 19:38:44,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:38:44,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:44,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:38:44,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:38:44,529 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:45,081 INFO L93 Difference]: Finished difference Result 1100 states and 3241 transitions. [2021-06-12 19:38:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:38:45,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:38:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:45,082 INFO L225 Difference]: With dead ends: 1100 [2021-06-12 19:38:45,082 INFO L226 Difference]: Without dead ends: 1081 [2021-06-12 19:38:45,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:38:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-12 19:38:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 899. [2021-06-12 19:38:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1447661469933186) internal successors, (2824), 898 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2824 transitions. [2021-06-12 19:38:45,092 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2824 transitions. Word has length 19 [2021-06-12 19:38:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:45,092 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2824 transitions. [2021-06-12 19:38:45,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2824 transitions. [2021-06-12 19:38:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:45,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:45,093 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:45,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11806,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:38:45,294 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:45,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1898890171, now seen corresponding path program 172 times [2021-06-12 19:38:45,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:45,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840274824] [2021-06-12 19:38:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:45,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:45,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840274824] [2021-06-12 19:38:45,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840274824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:45,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999794118] [2021-06-12 19:38:45,405 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 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 [2021-06-12 19:38:45,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:38:45,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:45,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:45,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:45,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:46,481 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 281 [2021-06-12 19:38:46,712 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-06-12 19:38:47,126 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-06-12 19:38:47,244 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-06-12 19:38:47,380 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 204 [2021-06-12 19:38:48,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:48,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:48,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:48,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:48,754 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:48,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:48,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:48,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999794118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:48,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:48,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:38:48,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708668101] [2021-06-12 19:38:48,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:38:48,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:48,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:38:48,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:38:48,797 INFO L87 Difference]: Start difference. First operand 899 states and 2824 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:49,491 INFO L93 Difference]: Finished difference Result 1077 states and 3204 transitions. [2021-06-12 19:38:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:38:49,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:38:49,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:49,493 INFO L225 Difference]: With dead ends: 1077 [2021-06-12 19:38:49,493 INFO L226 Difference]: Without dead ends: 1067 [2021-06-12 19:38:49,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:38:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-12 19:38:49,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 919. [2021-06-12 19:38:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-06-12 19:38:49,502 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-06-12 19:38:49,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:49,502 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-06-12 19:38:49,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:49,503 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-06-12 19:38:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:49,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:49,504 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:49,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12108 [2021-06-12 19:38:49,720 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:49,720 INFO L82 PathProgramCache]: Analyzing trace with hash -490352513, now seen corresponding path program 173 times [2021-06-12 19:38:49,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:49,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538131925] [2021-06-12 19:38:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:49,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538131925] [2021-06-12 19:38:49,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538131925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:49,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45464546] [2021-06-12 19:38:49,815 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 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 [2021-06-12 19:38:49,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:38:49,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:49,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:49,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:50,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:50,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:51,795 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 328 [2021-06-12 19:38:51,969 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-06-12 19:38:52,150 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-06-12 19:38:52,350 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 350 [2021-06-12 19:38:52,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:52,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:52,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:53,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:53,234 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:53,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:53,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:53,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45464546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:53,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:53,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:38:53,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866172911] [2021-06-12 19:38:53,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:38:53,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:53,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:38:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:38:53,262 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:53,896 INFO L93 Difference]: Finished difference Result 1009 states and 3050 transitions. [2021-06-12 19:38:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:38:53,897 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:38:53,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:53,898 INFO L225 Difference]: With dead ends: 1009 [2021-06-12 19:38:53,898 INFO L226 Difference]: Without dead ends: 999 [2021-06-12 19:38:53,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:38:53,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-12 19:38:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 919. [2021-06-12 19:38:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-06-12 19:38:53,908 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-06-12 19:38:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:53,908 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-06-12 19:38:53,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-06-12 19:38:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:53,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:53,909 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:54,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12492,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:38:54,113 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:54,114 INFO L82 PathProgramCache]: Analyzing trace with hash -901042152, now seen corresponding path program 174 times [2021-06-12 19:38:54,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:54,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129583667] [2021-06-12 19:38:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:54,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:54,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129583667] [2021-06-12 19:38:54,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129583667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:54,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879588870] [2021-06-12 19:38:54,151 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 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 [2021-06-12 19:38:54,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:38:54,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:54,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:38:54,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:54,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879588870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:54,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:54,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:38:54,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550631401] [2021-06-12 19:38:54,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:38:54,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:54,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:38:54,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:38:54,208 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:38:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:54,301 INFO L93 Difference]: Finished difference Result 1576 states and 4658 transitions. [2021-06-12 19:38:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:38:54,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 [2021-06-12 19:38:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:54,302 INFO L225 Difference]: With dead ends: 1576 [2021-06-12 19:38:54,302 INFO L226 Difference]: Without dead ends: 1576 [2021-06-12 19:38:54,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:38:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-12 19:38:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1265. [2021-06-12 19:38:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2207278481012658) internal successors, (4071), 1264 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4071 transitions. [2021-06-12 19:38:54,316 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4071 transitions. Word has length 19 [2021-06-12 19:38:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:54,317 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4071 transitions. [2021-06-12 19:38:54,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:38:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4071 transitions. [2021-06-12 19:38:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:54,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:54,318 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:54,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12939 [2021-06-12 19:38:54,519 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash -95823877, now seen corresponding path program 175 times [2021-06-12 19:38:54,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:54,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802141609] [2021-06-12 19:38:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:54,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:54,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802141609] [2021-06-12 19:38:54,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802141609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:54,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202103788] [2021-06-12 19:38:54,637 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 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 [2021-06-12 19:38:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:54,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:54,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:54,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:55,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:55,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:55,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:38:55,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:38:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:55,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202103788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:55,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:55,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:38:55,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727777673] [2021-06-12 19:38:55,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:38:55,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:38:55,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:38:55,459 INFO L87 Difference]: Start difference. First operand 1265 states and 4071 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:55,945 INFO L93 Difference]: Finished difference Result 1300 states and 4138 transitions. [2021-06-12 19:38:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:38:55,945 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:38:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:55,947 INFO L225 Difference]: With dead ends: 1300 [2021-06-12 19:38:55,947 INFO L226 Difference]: Without dead ends: 1287 [2021-06-12 19:38:55,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:38:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-12 19:38:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1265. [2021-06-12 19:38:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2056962025316458) internal successors, (4052), 1264 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4052 transitions. [2021-06-12 19:38:55,960 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4052 transitions. Word has length 19 [2021-06-12 19:38:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:55,960 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4052 transitions. [2021-06-12 19:38:55,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:38:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4052 transitions. [2021-06-12 19:38:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:55,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:55,961 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:56,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12940 [2021-06-12 19:38:56,181 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash 647759483, now seen corresponding path program 176 times [2021-06-12 19:38:56,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:56,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108517787] [2021-06-12 19:38:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:38:56,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:56,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108517787] [2021-06-12 19:38:56,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108517787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:56,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361568559] [2021-06-12 19:38:56,272 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 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 [2021-06-12 19:38:56,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:38:56,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:56,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:56,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:38:56,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:56,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:38:57,723 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-06-12 19:38:57,841 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-06-12 19:38:57,980 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 249 [2021-06-12 19:38:58,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:38:58,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:38:58,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:38:59,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:38:59,143 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:38:59,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:38:59,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:38:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:38:59,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361568559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:59,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:38:59,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:38:59,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167872321] [2021-06-12 19:38:59,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:38:59,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:38:59,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:38:59,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:38:59,172 INFO L87 Difference]: Start difference. First operand 1265 states and 4052 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:38:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:38:59,595 INFO L93 Difference]: Finished difference Result 1377 states and 4307 transitions. [2021-06-12 19:38:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:38:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 19 [2021-06-12 19:38:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:38:59,596 INFO L225 Difference]: With dead ends: 1377 [2021-06-12 19:38:59,596 INFO L226 Difference]: Without dead ends: 1365 [2021-06-12 19:38:59,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:38:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-12 19:38:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1263. [2021-06-12 19:38:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 3.2044374009508716) internal successors, (4044), 1262 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:38:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4044 transitions. [2021-06-12 19:38:59,609 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4044 transitions. Word has length 19 [2021-06-12 19:38:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:38:59,609 INFO L482 AbstractCegarLoop]: Abstraction has 1263 states and 4044 transitions. [2021-06-12 19:38:59,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:38:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4044 transitions. [2021-06-12 19:38:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:38:59,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:38:59,611 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:38:59,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13055 [2021-06-12 19:38:59,825 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:38:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:38:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1498903615, now seen corresponding path program 177 times [2021-06-12 19:38:59,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:38:59,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387544972] [2021-06-12 19:38:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:38:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:38:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:38:59,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:38:59,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387544972] [2021-06-12 19:38:59,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387544972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:38:59,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937557183] [2021-06-12 19:38:59,910 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 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 [2021-06-12 19:38:59,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:38:59,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:38:59,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:38:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:00,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:00,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:01,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:01,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:01,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:02,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:02,314 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:02,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:02,315 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:02,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937557183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:02,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:02,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:39:02,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616069721] [2021-06-12 19:39:02,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:39:02,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:39:02,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:39:02,342 INFO L87 Difference]: Start difference. First operand 1263 states and 4044 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:39:02,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:02,869 INFO L93 Difference]: Finished difference Result 1437 states and 4435 transitions. [2021-06-12 19:39:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:39:02,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 19 [2021-06-12 19:39:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:02,871 INFO L225 Difference]: With dead ends: 1437 [2021-06-12 19:39:02,871 INFO L226 Difference]: Without dead ends: 1427 [2021-06-12 19:39:02,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:39:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-06-12 19:39:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1266. [2021-06-12 19:39:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.205533596837945) internal successors, (4055), 1265 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4055 transitions. [2021-06-12 19:39:02,885 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4055 transitions. Word has length 19 [2021-06-12 19:39:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:02,885 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4055 transitions. [2021-06-12 19:39:02,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:39:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4055 transitions. [2021-06-12 19:39:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:02,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:02,886 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:03,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13472,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:03,087 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2114567931, now seen corresponding path program 178 times [2021-06-12 19:39:03,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:03,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132103985] [2021-06-12 19:39:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:03,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:03,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132103985] [2021-06-12 19:39:03,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132103985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:03,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420798404] [2021-06-12 19:39:03,192 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 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 [2021-06-12 19:39:03,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:39:03,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:03,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:03,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:03,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:04,012 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 198 [2021-06-12 19:39:04,880 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 217 [2021-06-12 19:39:05,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:05,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:05,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:05,762 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 239 [2021-06-12 19:39:06,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:06,443 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:06,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:06,444 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:06,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420798404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:06,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:06,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:39:06,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537529443] [2021-06-12 19:39:06,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:39:06,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:39:06,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:39:06,471 INFO L87 Difference]: Start difference. First operand 1266 states and 4055 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:07,208 INFO L93 Difference]: Finished difference Result 1415 states and 4386 transitions. [2021-06-12 19:39:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:39:07,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:39:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:07,211 INFO L225 Difference]: With dead ends: 1415 [2021-06-12 19:39:07,211 INFO L226 Difference]: Without dead ends: 1403 [2021-06-12 19:39:07,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 612.3ms TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:39:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-12 19:39:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1283. [2021-06-12 19:39:07,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.207488299531981) internal successors, (4112), 1282 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4112 transitions. [2021-06-12 19:39:07,224 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4112 transitions. Word has length 19 [2021-06-12 19:39:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:07,225 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4112 transitions. [2021-06-12 19:39:07,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4112 transitions. [2021-06-12 19:39:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:07,226 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:07,227 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:07,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13775,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:07,437 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1223219970, now seen corresponding path program 179 times [2021-06-12 19:39:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:07,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648647402] [2021-06-12 19:39:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:07,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:07,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648647402] [2021-06-12 19:39:07,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648647402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:07,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488005163] [2021-06-12 19:39:07,479 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 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 [2021-06-12 19:39:07,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:39:07,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:39:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:07,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488005163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:07,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:07,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:39:07,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144414435] [2021-06-12 19:39:07,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:39:07,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:07,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:39:07,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:39:07,535 INFO L87 Difference]: Start difference. First operand 1283 states and 4112 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:39:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:07,618 INFO L93 Difference]: Finished difference Result 1610 states and 4775 transitions. [2021-06-12 19:39:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:39:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 [2021-06-12 19:39:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:07,620 INFO L225 Difference]: With dead ends: 1610 [2021-06-12 19:39:07,620 INFO L226 Difference]: Without dead ends: 1610 [2021-06-12 19:39:07,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:39:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-12 19:39:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1245. [2021-06-12 19:39:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-06-12 19:39:07,634 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-06-12 19:39:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:07,634 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-06-12 19:39:07,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:39:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-06-12 19:39:07,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:07,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:07,635 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:07,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14175,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:07,836 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:07,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:07,836 INFO L82 PathProgramCache]: Analyzing trace with hash -274674753, now seen corresponding path program 180 times [2021-06-12 19:39:07,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:07,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940771802] [2021-06-12 19:39:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:07,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:07,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940771802] [2021-06-12 19:39:07,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940771802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:07,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341501142] [2021-06-12 19:39:07,983 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 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 [2021-06-12 19:39:08,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:39:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:08,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:08,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:08,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:08,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:09,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:09,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:09,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:09,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:09,466 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:09,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:09,467 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:09,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341501142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:09,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:09,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:39:09,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425011254] [2021-06-12 19:39:09,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:39:09,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:09,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:39:09,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:39:09,494 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:10,056 INFO L93 Difference]: Finished difference Result 1317 states and 4106 transitions. [2021-06-12 19:39:10,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:39:10,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:39:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:10,058 INFO L225 Difference]: With dead ends: 1317 [2021-06-12 19:39:10,058 INFO L226 Difference]: Without dead ends: 1307 [2021-06-12 19:39:10,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:39:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-12 19:39:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1245. [2021-06-12 19:39:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-06-12 19:39:10,071 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-06-12 19:39:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:10,072 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-06-12 19:39:10,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-06-12 19:39:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:10,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:10,073 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:10,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14176,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:10,289 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash -685364392, now seen corresponding path program 181 times [2021-06-12 19:39:10,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:10,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733796549] [2021-06-12 19:39:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:10,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:10,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733796549] [2021-06-12 19:39:10,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733796549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:10,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059560392] [2021-06-12 19:39:10,326 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 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 [2021-06-12 19:39:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:10,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:39:10,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:10,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059560392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:10,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:10,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:39:10,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277307610] [2021-06-12 19:39:10,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:39:10,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:10,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:39:10,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:39:10,376 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:39:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:10,466 INFO L93 Difference]: Finished difference Result 2061 states and 6320 transitions. [2021-06-12 19:39:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:39:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 [2021-06-12 19:39:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:10,468 INFO L225 Difference]: With dead ends: 2061 [2021-06-12 19:39:10,468 INFO L226 Difference]: Without dead ends: 2061 [2021-06-12 19:39:10,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:39:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-12 19:39:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1804. [2021-06-12 19:39:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-06-12 19:39:10,489 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-06-12 19:39:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:10,489 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-06-12 19:39:10,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:39:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-06-12 19:39:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:10,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:10,491 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:10,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14384 [2021-06-12 19:39:10,691 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:10,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:10,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1326753925, now seen corresponding path program 182 times [2021-06-12 19:39:10,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:10,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976576911] [2021-06-12 19:39:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:10,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:10,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976576911] [2021-06-12 19:39:10,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976576911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:10,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972367524] [2021-06-12 19:39:10,787 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 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 [2021-06-12 19:39:10,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:39:10,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:10,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:11,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:11,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:12,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:12,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:12,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:12,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:12,906 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:12,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:12,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:12,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972367524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:12,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:12,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:39:12,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789831424] [2021-06-12 19:39:12,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:39:12,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:12,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:39:12,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:39:12,934 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:13,553 INFO L93 Difference]: Finished difference Result 1866 states and 5973 transitions. [2021-06-12 19:39:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:39:13,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:39:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:13,556 INFO L225 Difference]: With dead ends: 1866 [2021-06-12 19:39:13,556 INFO L226 Difference]: Without dead ends: 1856 [2021-06-12 19:39:13,556 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 666.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:39:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-12 19:39:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1804. [2021-06-12 19:39:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-06-12 19:39:13,575 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-06-12 19:39:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:13,575 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-06-12 19:39:13,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-06-12 19:39:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:13,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:13,577 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:13,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14385,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:13,777 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1191710658, now seen corresponding path program 183 times [2021-06-12 19:39:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:13,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824132824] [2021-06-12 19:39:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:13,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:13,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824132824] [2021-06-12 19:39:13,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824132824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:13,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406706929] [2021-06-12 19:39:13,818 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 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 [2021-06-12 19:39:13,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:39:13,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:39:13,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:13,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406706929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:13,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:13,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:39:13,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488640199] [2021-06-12 19:39:13,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:39:13,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:13,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:39:13,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:39:13,870 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:39:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:13,995 INFO L93 Difference]: Finished difference Result 2380 states and 7376 transitions. [2021-06-12 19:39:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:39:13,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 [2021-06-12 19:39:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:13,997 INFO L225 Difference]: With dead ends: 2380 [2021-06-12 19:39:13,997 INFO L226 Difference]: Without dead ends: 2380 [2021-06-12 19:39:13,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:39:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-12 19:39:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2051. [2021-06-12 19:39:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2712195121951217) internal successors, (6706), 2050 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6706 transitions. [2021-06-12 19:39:14,019 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6706 transitions. Word has length 19 [2021-06-12 19:39:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:14,019 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6706 transitions. [2021-06-12 19:39:14,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:39:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6706 transitions. [2021-06-12 19:39:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:14,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:14,021 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:14,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14698 [2021-06-12 19:39:14,221 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:14,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1038408603, now seen corresponding path program 184 times [2021-06-12 19:39:14,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:14,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127084700] [2021-06-12 19:39:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:39:14,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:14,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127084700] [2021-06-12 19:39:14,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127084700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:14,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736429142] [2021-06-12 19:39:14,298 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 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 [2021-06-12 19:39:14,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:39:14,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:14,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:14,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:14,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:15,612 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 244 [2021-06-12 19:39:15,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:15,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:15,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:39:15,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:39:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:15,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736429142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:15,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:15,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-12 19:39:15,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578169647] [2021-06-12 19:39:15,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:39:15,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:15,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:39:15,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:39:15,870 INFO L87 Difference]: Start difference. First operand 2051 states and 6706 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:39:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:16,114 INFO L93 Difference]: Finished difference Result 2076 states and 6747 transitions. [2021-06-12 19:39:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:39:16,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 19 [2021-06-12 19:39:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:16,116 INFO L225 Difference]: With dead ends: 2076 [2021-06-12 19:39:16,116 INFO L226 Difference]: Without dead ends: 2063 [2021-06-12 19:39:16,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:39:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-12 19:39:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2051. [2021-06-12 19:39:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.270243902439024) internal successors, (6704), 2050 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6704 transitions. [2021-06-12 19:39:16,138 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6704 transitions. Word has length 19 [2021-06-12 19:39:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:16,138 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6704 transitions. [2021-06-12 19:39:16,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:39:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6704 transitions. [2021-06-12 19:39:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:16,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:16,140 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:16,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14699 [2021-06-12 19:39:16,353 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:16,353 INFO L82 PathProgramCache]: Analyzing trace with hash -186075179, now seen corresponding path program 185 times [2021-06-12 19:39:16,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:16,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329116798] [2021-06-12 19:39:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:39:16,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:16,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329116798] [2021-06-12 19:39:16,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329116798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:16,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757813658] [2021-06-12 19:39:16,433 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 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 [2021-06-12 19:39:16,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:39:16,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:16,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:16,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:16,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:16,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:17,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:17,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:17,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:39:17,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:39:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:17,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757813658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:17,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:17,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-12 19:39:17,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705086715] [2021-06-12 19:39:17,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:39:17,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:17,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:39:17,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:39:17,735 INFO L87 Difference]: Start difference. First operand 2051 states and 6704 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:39:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:17,988 INFO L93 Difference]: Finished difference Result 2076 states and 6752 transitions. [2021-06-12 19:39:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:39:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 19 [2021-06-12 19:39:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:17,991 INFO L225 Difference]: With dead ends: 2076 [2021-06-12 19:39:17,991 INFO L226 Difference]: Without dead ends: 2067 [2021-06-12 19:39:17,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:39:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-06-12 19:39:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2053. [2021-06-12 19:39:18,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.269980506822612) internal successors, (6710), 2052 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6710 transitions. [2021-06-12 19:39:18,013 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6710 transitions. Word has length 19 [2021-06-12 19:39:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:18,013 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 6710 transitions. [2021-06-12 19:39:18,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:39:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6710 transitions. [2021-06-12 19:39:18,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:18,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:18,014 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:18,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14956,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:18,215 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash 557508181, now seen corresponding path program 186 times [2021-06-12 19:39:18,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:18,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147186756] [2021-06-12 19:39:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:39:18,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:18,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147186756] [2021-06-12 19:39:18,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147186756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:18,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529789837] [2021-06-12 19:39:18,292 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 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 [2021-06-12 19:39:18,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:39:18,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:18,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:18,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:18,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:19,138 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 292 [2021-06-12 19:39:19,343 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 305 [2021-06-12 19:39:19,500 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 425 [2021-06-12 19:39:20,669 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 357 [2021-06-12 19:39:21,601 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 451 [2021-06-12 19:39:22,020 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-06-12 19:39:22,436 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-06-12 19:39:22,902 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 582 [2021-06-12 19:39:23,417 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 698 [2021-06-12 19:39:23,739 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 511 [2021-06-12 19:39:24,410 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 315 [2021-06-12 19:39:24,819 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 259 [2021-06-12 19:39:24,928 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 259 [2021-06-12 19:39:25,047 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 262 [2021-06-12 19:39:25,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:25,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:25,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:26,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:26,574 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:26,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:26,574 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:26,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529789837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:26,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:26,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-12 19:39:26,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589174749] [2021-06-12 19:39:26,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:39:26,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:26,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:39:26,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:39:26,602 INFO L87 Difference]: Start difference. First operand 2053 states and 6710 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:39:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:26,946 INFO L93 Difference]: Finished difference Result 2108 states and 6809 transitions. [2021-06-12 19:39:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:39:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 19 [2021-06-12 19:39:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:26,948 INFO L225 Difference]: With dead ends: 2108 [2021-06-12 19:39:26,948 INFO L226 Difference]: Without dead ends: 2098 [2021-06-12 19:39:26,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:39:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-12 19:39:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 2052. [2021-06-12 19:39:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.270112140419308) internal successors, (6707), 2051 states have internal predecessors, (6707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6707 transitions. [2021-06-12 19:39:26,970 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6707 transitions. Word has length 19 [2021-06-12 19:39:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:26,970 INFO L482 AbstractCegarLoop]: Abstraction has 2052 states and 6707 transitions. [2021-06-12 19:39:26,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-06-12 19:39:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6707 transitions. [2021-06-12 19:39:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:26,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:26,972 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:27,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15124,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:27,172 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash -5033861, now seen corresponding path program 187 times [2021-06-12 19:39:27,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:27,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452976966] [2021-06-12 19:39:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:39:27,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:27,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452976966] [2021-06-12 19:39:27,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452976966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:27,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756820639] [2021-06-12 19:39:27,269 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 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 [2021-06-12 19:39:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:27,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:27,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:27,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:28,722 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 162 [2021-06-12 19:39:29,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:29,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:29,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:29,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:30,002 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:30,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:30,003 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:30,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756820639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:30,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:30,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:39:30,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445549303] [2021-06-12 19:39:30,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:39:30,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:39:30,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:39:30,028 INFO L87 Difference]: Start difference. First operand 2052 states and 6707 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:39:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:30,586 INFO L93 Difference]: Finished difference Result 2150 states and 6903 transitions. [2021-06-12 19:39:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:39:30,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-06-12 19:39:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:30,589 INFO L225 Difference]: With dead ends: 2150 [2021-06-12 19:39:30,589 INFO L226 Difference]: Without dead ends: 2140 [2021-06-12 19:39:30,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 494.4ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:39:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-06-12 19:39:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2066. [2021-06-12 19:39:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.2677966101694915) internal successors, (6748), 2065 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 6748 transitions. [2021-06-12 19:39:30,611 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 6748 transitions. Word has length 19 [2021-06-12 19:39:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:30,611 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 6748 transitions. [2021-06-12 19:39:30,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:39:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 6748 transitions. [2021-06-12 19:39:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:30,613 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:30,613 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:30,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16111 [2021-06-12 19:39:30,813 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:30,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1900690751, now seen corresponding path program 188 times [2021-06-12 19:39:30,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:30,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865077844] [2021-06-12 19:39:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:39:30,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:30,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865077844] [2021-06-12 19:39:30,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865077844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:30,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370506004] [2021-06-12 19:39:30,895 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 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 [2021-06-12 19:39:30,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:39:30,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:30,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:31,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:31,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:31,923 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 267 [2021-06-12 19:39:32,053 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 281 [2021-06-12 19:39:32,671 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-06-12 19:39:32,824 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-06-12 19:39:32,980 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 286 [2021-06-12 19:39:33,215 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 299 [2021-06-12 19:39:33,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:33,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:34,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:34,120 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:34,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:34,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:34,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370506004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:34,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:34,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:39:34,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352465007] [2021-06-12 19:39:34,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:39:34,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:34,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:39:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:39:34,147 INFO L87 Difference]: Start difference. First operand 2066 states and 6748 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:39:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:34,717 INFO L93 Difference]: Finished difference Result 2201 states and 7027 transitions. [2021-06-12 19:39:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:39:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-06-12 19:39:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:34,720 INFO L225 Difference]: With dead ends: 2201 [2021-06-12 19:39:34,720 INFO L226 Difference]: Without dead ends: 2171 [2021-06-12 19:39:34,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 550.5ms TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:39:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-12 19:39:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2055. [2021-06-12 19:39:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2658227848101267) internal successors, (6708), 2054 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6708 transitions. [2021-06-12 19:39:34,742 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6708 transitions. Word has length 19 [2021-06-12 19:39:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:34,742 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6708 transitions. [2021-06-12 19:39:34,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:39:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6708 transitions. [2021-06-12 19:39:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:34,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:34,744 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:34,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16439 [2021-06-12 19:39:34,944 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:34,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1478101077, now seen corresponding path program 189 times [2021-06-12 19:39:34,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:34,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756134684] [2021-06-12 19:39:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:35,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:35,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756134684] [2021-06-12 19:39:35,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756134684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:35,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898018177] [2021-06-12 19:39:35,049 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:39:35,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:39:35,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:35,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:35,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:35,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:36,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:36,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:36,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:37,902 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 231 [2021-06-12 19:39:38,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:38,049 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:38,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:38,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:38,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898018177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:38,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:38,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:39:38,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465859147] [2021-06-12 19:39:38,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:39:38,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:38,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:39:38,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:39:38,077 INFO L87 Difference]: Start difference. First operand 2055 states and 6708 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:38,643 INFO L93 Difference]: Finished difference Result 2182 states and 6988 transitions. [2021-06-12 19:39:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:39:38,643 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:39:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:38,646 INFO L225 Difference]: With dead ends: 2182 [2021-06-12 19:39:38,646 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 19:39:38,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 602.4ms TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:39:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 19:39:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2074. [2021-06-12 19:39:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 3.263868789194404) internal successors, (6766), 2073 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 6766 transitions. [2021-06-12 19:39:38,668 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 6766 transitions. Word has length 19 [2021-06-12 19:39:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:38,668 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 6766 transitions. [2021-06-12 19:39:38,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 6766 transitions. [2021-06-12 19:39:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:38,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:38,670 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:38,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16811,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:38,870 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash -911141607, now seen corresponding path program 190 times [2021-06-12 19:39:38,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:38,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843935501] [2021-06-12 19:39:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:38,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:38,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843935501] [2021-06-12 19:39:38,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843935501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:38,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262603244] [2021-06-12 19:39:38,965 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 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 [2021-06-12 19:39:38,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:39:38,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:38,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:38,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:39,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:39,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:40,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:40,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:40,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:41,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:41,359 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:41,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:41,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:41,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262603244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:41,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:41,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:39:41,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140107414] [2021-06-12 19:39:41,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:39:41,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:41,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:39:41,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:39:41,389 INFO L87 Difference]: Start difference. First operand 2074 states and 6766 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:42,014 INFO L93 Difference]: Finished difference Result 2241 states and 7161 transitions. [2021-06-12 19:39:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:39:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:39:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:42,016 INFO L225 Difference]: With dead ends: 2241 [2021-06-12 19:39:42,016 INFO L226 Difference]: Without dead ends: 2215 [2021-06-12 19:39:42,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 622.3ms TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:39:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-06-12 19:39:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2055. [2021-06-12 19:39:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-06-12 19:39:42,039 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-06-12 19:39:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:42,039 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-06-12 19:39:42,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-06-12 19:39:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:42,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:42,041 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:42,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17226,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:42,242 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:42,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1963220779, now seen corresponding path program 191 times [2021-06-12 19:39:42,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:42,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83464822] [2021-06-12 19:39:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:42,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:42,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83464822] [2021-06-12 19:39:42,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83464822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:42,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941580534] [2021-06-12 19:39:42,355 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 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 [2021-06-12 19:39:42,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:39:42,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:42,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:42,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:42,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:42,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:44,223 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-06-12 19:39:44,348 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-06-12 19:39:44,547 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 267 [2021-06-12 19:39:45,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:45,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:45,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:45,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:45,433 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:45,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:45,434 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:45,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941580534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:45,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:45,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:39:45,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266022981] [2021-06-12 19:39:45,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:39:45,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:45,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:39:45,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:39:45,460 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:46,037 INFO L93 Difference]: Finished difference Result 2116 states and 6803 transitions. [2021-06-12 19:39:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:39:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:39:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:46,039 INFO L225 Difference]: With dead ends: 2116 [2021-06-12 19:39:46,039 INFO L226 Difference]: Without dead ends: 2106 [2021-06-12 19:39:46,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 667.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:39:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-12 19:39:46,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2055. [2021-06-12 19:39:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-06-12 19:39:46,061 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-06-12 19:39:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:46,061 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-06-12 19:39:46,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-06-12 19:39:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:46,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:46,063 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:46,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17573 [2021-06-12 19:39:46,263 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:46,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1999747909, now seen corresponding path program 192 times [2021-06-12 19:39:46,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:46,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592261784] [2021-06-12 19:39:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:46,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592261784] [2021-06-12 19:39:46,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592261784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399446584] [2021-06-12 19:39:46,377 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 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 [2021-06-12 19:39:46,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:39:46,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:46,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:46,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:46,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:46,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:47,238 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 297 [2021-06-12 19:39:48,259 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-06-12 19:39:48,390 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-06-12 19:39:48,547 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 285 [2021-06-12 19:39:48,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:48,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:48,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:39:48,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:39:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:48,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399446584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:48,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:48,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:39:48,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033456892] [2021-06-12 19:39:48,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:39:48,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:48,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:39:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:39:48,737 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:49,154 INFO L93 Difference]: Finished difference Result 2086 states and 6761 transitions. [2021-06-12 19:39:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:39:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:39:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:49,156 INFO L225 Difference]: With dead ends: 2086 [2021-06-12 19:39:49,156 INFO L226 Difference]: Without dead ends: 2075 [2021-06-12 19:39:49,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:39:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-06-12 19:39:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2055. [2021-06-12 19:39:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-06-12 19:39:49,178 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-06-12 19:39:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:49,178 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-06-12 19:39:49,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:39:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-06-12 19:39:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:49,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:49,180 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:49,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17916,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:39:49,380 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:49,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1256164549, now seen corresponding path program 193 times [2021-06-12 19:39:49,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:49,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319863347] [2021-06-12 19:39:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:39:49,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:49,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319863347] [2021-06-12 19:39:49,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319863347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:49,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687989958] [2021-06-12 19:39:49,469 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 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 [2021-06-12 19:39:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:49,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:49,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:49,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:49,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:50,545 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 232 [2021-06-12 19:39:51,165 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 180 [2021-06-12 19:39:51,775 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 183 [2021-06-12 19:39:51,971 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 283 [2021-06-12 19:39:52,219 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 290 [2021-06-12 19:39:52,536 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-06-12 19:39:52,847 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-06-12 19:39:53,183 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 404 [2021-06-12 19:39:53,510 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 402 [2021-06-12 19:39:54,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:54,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:54,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:55,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:55,679 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:55,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:55,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:55,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687989958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:55,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:55,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:39:55,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000642958] [2021-06-12 19:39:55,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:39:55,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:55,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:39:55,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:39:55,721 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:39:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:39:56,412 INFO L93 Difference]: Finished difference Result 2182 states and 7001 transitions. [2021-06-12 19:39:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:39:56,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 19 [2021-06-12 19:39:56,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:39:56,415 INFO L225 Difference]: With dead ends: 2182 [2021-06-12 19:39:56,415 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 19:39:56,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:39:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 19:39:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2055. [2021-06-12 19:39:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:39:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-06-12 19:39:56,438 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-06-12 19:39:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:39:56,438 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-06-12 19:39:56,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:39:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-06-12 19:39:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:39:56,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:39:56,440 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:39:56,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18314 [2021-06-12 19:39:56,640 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:39:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:39:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash -405020417, now seen corresponding path program 194 times [2021-06-12 19:39:56,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:39:56,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387102311] [2021-06-12 19:39:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:39:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:39:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:56,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:39:56,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387102311] [2021-06-12 19:39:56,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387102311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:56,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535118639] [2021-06-12 19:39:56,725 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 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 [2021-06-12 19:39:56,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:39:56,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:39:56,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:39:56,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:39:57,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:57,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:39:58,266 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 220 [2021-06-12 19:39:58,372 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 220 [2021-06-12 19:39:58,492 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 225 [2021-06-12 19:39:58,633 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 237 [2021-06-12 19:39:58,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:39:58,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:39:58,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:39:59,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:39:59,272 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:39:59,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:39:59,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:39:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:39:59,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535118639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:39:59,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:39:59,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:39:59,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890539405] [2021-06-12 19:39:59,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:39:59,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:39:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:39:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:39:59,298 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:40:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:00,082 INFO L93 Difference]: Finished difference Result 2292 states and 7285 transitions. [2021-06-12 19:40:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 19:40:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 19 [2021-06-12 19:40:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:00,086 INFO L225 Difference]: With dead ends: 2292 [2021-06-12 19:40:00,086 INFO L226 Difference]: Without dead ends: 2280 [2021-06-12 19:40:00,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 546.6ms TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:40:00,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-12 19:40:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2076. [2021-06-12 19:40:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 3.261686746987952) internal successors, (6768), 2075 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6768 transitions. [2021-06-12 19:40:00,109 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6768 transitions. Word has length 19 [2021-06-12 19:40:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:00,109 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 6768 transitions. [2021-06-12 19:40:00,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:40:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6768 transitions. [2021-06-12 19:40:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:00,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:00,111 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:00,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18885,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:00,325 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:00,325 INFO L82 PathProgramCache]: Analyzing trace with hash 210643899, now seen corresponding path program 195 times [2021-06-12 19:40:00,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:00,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182072804] [2021-06-12 19:40:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:00,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:00,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182072804] [2021-06-12 19:40:00,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182072804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:00,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601428852] [2021-06-12 19:40:00,445 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 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 [2021-06-12 19:40:00,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:40:00,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:00,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:00,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:00,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:00,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:02,172 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 265 [2021-06-12 19:40:04,385 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-06-12 19:40:04,587 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-06-12 19:40:04,829 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 848 DAG size of output: 392 [2021-06-12 19:40:05,103 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 517 [2021-06-12 19:40:05,392 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 241 [2021-06-12 19:40:05,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:05,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:06,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:06,031 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:06,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:06,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:06,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601428852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:06,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:06,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:40:06,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370921503] [2021-06-12 19:40:06,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:40:06,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:06,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:40:06,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:40:06,060 INFO L87 Difference]: Start difference. First operand 2076 states and 6768 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:07,222 INFO L93 Difference]: Finished difference Result 2278 states and 7226 transitions. [2021-06-12 19:40:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:40:07,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:40:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:07,225 INFO L225 Difference]: With dead ends: 2278 [2021-06-12 19:40:07,225 INFO L226 Difference]: Without dead ends: 2266 [2021-06-12 19:40:07,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 833.9ms TimeCoverageRelationStatistics Valid=321, Invalid=2229, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:40:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-12 19:40:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2093. [2021-06-12 19:40:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2092 states have (on average 3.2633843212237093) internal successors, (6827), 2092 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 6827 transitions. [2021-06-12 19:40:07,248 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 6827 transitions. Word has length 19 [2021-06-12 19:40:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:07,248 INFO L482 AbstractCegarLoop]: Abstraction has 2093 states and 6827 transitions. [2021-06-12 19:40:07,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 6827 transitions. [2021-06-12 19:40:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:07,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:07,250 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:07,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19223 [2021-06-12 19:40:07,451 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:07,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2116368511, now seen corresponding path program 196 times [2021-06-12 19:40:07,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:07,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037349931] [2021-06-12 19:40:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:07,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:07,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037349931] [2021-06-12 19:40:07,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037349931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:07,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438298228] [2021-06-12 19:40:07,564 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 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 [2021-06-12 19:40:07,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:40:07,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:07,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:07,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:07,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:07,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:09,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:09,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:09,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:09,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:09,638 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:09,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:09,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:09,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438298228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:09,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:09,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:40:09,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585204025] [2021-06-12 19:40:09,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:40:09,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:09,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:40:09,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:40:09,671 INFO L87 Difference]: Start difference. First operand 2093 states and 6827 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:10,908 INFO L93 Difference]: Finished difference Result 2437 states and 7752 transitions. [2021-06-12 19:40:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:40:10,908 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:40:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:10,912 INFO L225 Difference]: With dead ends: 2437 [2021-06-12 19:40:10,912 INFO L226 Difference]: Without dead ends: 2423 [2021-06-12 19:40:10,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:40:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-12 19:40:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2022. [2021-06-12 19:40:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 3.2300841167738743) internal successors, (6528), 2021 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 6528 transitions. [2021-06-12 19:40:10,935 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 6528 transitions. Word has length 19 [2021-06-12 19:40:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:10,935 INFO L482 AbstractCegarLoop]: Abstraction has 2022 states and 6528 transitions. [2021-06-12 19:40:10,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 6528 transitions. [2021-06-12 19:40:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:10,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:10,937 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:11,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19814,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:11,138 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:11,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1705678872, now seen corresponding path program 197 times [2021-06-12 19:40:11,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:11,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883275261] [2021-06-12 19:40:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:11,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:11,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883275261] [2021-06-12 19:40:11,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883275261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:11,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975007067] [2021-06-12 19:40:11,188 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 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 [2021-06-12 19:40:11,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:40:11,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:40:11,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:11,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975007067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:11,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:11,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:40:11,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449245804] [2021-06-12 19:40:11,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:40:11,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:11,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:40:11,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:40:11,258 INFO L87 Difference]: Start difference. First operand 2022 states and 6528 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:40:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:11,344 INFO L93 Difference]: Finished difference Result 2332 states and 7081 transitions. [2021-06-12 19:40:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:40:11,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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 19 [2021-06-12 19:40:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:11,347 INFO L225 Difference]: With dead ends: 2332 [2021-06-12 19:40:11,347 INFO L226 Difference]: Without dead ends: 2332 [2021-06-12 19:40:11,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:40:11,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-12 19:40:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1261. [2021-06-12 19:40:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-06-12 19:40:11,363 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-06-12 19:40:11,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:11,363 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-06-12 19:40:11,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:40:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-06-12 19:40:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:11,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:11,365 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:11,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20067 [2021-06-12 19:40:11,565 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1064289339, now seen corresponding path program 198 times [2021-06-12 19:40:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:11,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495581125] [2021-06-12 19:40:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:11,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:11,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495581125] [2021-06-12 19:40:11,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495581125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:11,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570045356] [2021-06-12 19:40:11,695 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 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 [2021-06-12 19:40:11,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:40:11,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:11,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:11,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:12,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:12,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:12,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:13,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:13,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:13,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:13,553 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:13,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:13,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:13,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570045356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:13,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:13,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:40:13,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631006500] [2021-06-12 19:40:13,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:40:13,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:13,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:40:13,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:40:13,594 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:14,327 INFO L93 Difference]: Finished difference Result 1351 states and 4144 transitions. [2021-06-12 19:40:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:40:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:40:14,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:14,329 INFO L225 Difference]: With dead ends: 1351 [2021-06-12 19:40:14,329 INFO L226 Difference]: Without dead ends: 1341 [2021-06-12 19:40:14,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:40:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-12 19:40:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1261. [2021-06-12 19:40:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-06-12 19:40:14,342 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-06-12 19:40:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:14,342 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-06-12 19:40:14,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-06-12 19:40:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:14,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:14,343 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:14,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20068 [2021-06-12 19:40:14,544 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:14,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1199332606, now seen corresponding path program 199 times [2021-06-12 19:40:14,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:14,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397851267] [2021-06-12 19:40:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:14,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:14,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397851267] [2021-06-12 19:40:14,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397851267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:14,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633927140] [2021-06-12 19:40:14,585 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 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 [2021-06-12 19:40:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:40:14,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:14,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633927140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:14,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:14,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:40:14,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529865752] [2021-06-12 19:40:14,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:40:14,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:14,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:40:14,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:40:14,641 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:40:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:14,754 INFO L93 Difference]: Finished difference Result 1892 states and 5707 transitions. [2021-06-12 19:40:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:40:14,754 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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 19 [2021-06-12 19:40:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:14,756 INFO L225 Difference]: With dead ends: 1892 [2021-06-12 19:40:14,756 INFO L226 Difference]: Without dead ends: 1892 [2021-06-12 19:40:14,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:40:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-06-12 19:40:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1496. [2021-06-12 19:40:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-06-12 19:40:14,773 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-06-12 19:40:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:14,773 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-06-12 19:40:14,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:40:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-06-12 19:40:14,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:14,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:14,774 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:14,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20335 [2021-06-12 19:40:14,975 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:14,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1485393921, now seen corresponding path program 200 times [2021-06-12 19:40:14,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:14,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684841063] [2021-06-12 19:40:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:15,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684841063] [2021-06-12 19:40:15,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684841063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771533704] [2021-06-12 19:40:15,095 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 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 [2021-06-12 19:40:15,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:40:15,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:15,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:15,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:15,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:16,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:16,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:16,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:16,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:16,980 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:16,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:16,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:17,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771533704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:17,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:17,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:40:17,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040379824] [2021-06-12 19:40:17,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:40:17,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:40:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:40:17,009 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:17,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:17,744 INFO L93 Difference]: Finished difference Result 1563 states and 4870 transitions. [2021-06-12 19:40:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:40:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:40:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:17,746 INFO L225 Difference]: With dead ends: 1563 [2021-06-12 19:40:17,746 INFO L226 Difference]: Without dead ends: 1553 [2021-06-12 19:40:17,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 858.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:40:17,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-06-12 19:40:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1496. [2021-06-12 19:40:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-06-12 19:40:17,761 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-06-12 19:40:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:17,761 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-06-12 19:40:17,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-06-12 19:40:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:17,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:17,763 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:17,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20336 [2021-06-12 19:40:17,963 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1612499752, now seen corresponding path program 201 times [2021-06-12 19:40:17,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:17,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863091989] [2021-06-12 19:40:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:18,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:18,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863091989] [2021-06-12 19:40:18,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863091989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:18,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508431002] [2021-06-12 19:40:18,007 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 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 [2021-06-12 19:40:18,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:40:18,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:18,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:40:18,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:18,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508431002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:18,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:18,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:40:18,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352660689] [2021-06-12 19:40:18,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:40:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:40:18,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:40:18,069 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:40:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:18,231 INFO L93 Difference]: Finished difference Result 1980 states and 5974 transitions. [2021-06-12 19:40:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:40:18,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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 19 [2021-06-12 19:40:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:18,233 INFO L225 Difference]: With dead ends: 1980 [2021-06-12 19:40:18,233 INFO L226 Difference]: Without dead ends: 1980 [2021-06-12 19:40:18,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:40:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-12 19:40:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1650. [2021-06-12 19:40:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.187386294724075) internal successors, (5256), 1649 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5256 transitions. [2021-06-12 19:40:18,252 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5256 transitions. Word has length 19 [2021-06-12 19:40:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:18,252 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5256 transitions. [2021-06-12 19:40:18,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:40:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5256 transitions. [2021-06-12 19:40:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:18,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:18,253 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:18,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20582 [2021-06-12 19:40:18,454 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash 705955403, now seen corresponding path program 202 times [2021-06-12 19:40:18,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:18,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374484192] [2021-06-12 19:40:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:40:18,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:18,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374484192] [2021-06-12 19:40:18,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374484192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:18,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68931536] [2021-06-12 19:40:18,553 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 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 [2021-06-12 19:40:18,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:40:18,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:18,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:18,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:18,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:18,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:19,408 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 213 [2021-06-12 19:40:20,233 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 233 [2021-06-12 19:40:20,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:20,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:20,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:40:20,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:40:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:20,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68931536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:20,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:20,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:40:20,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537587797] [2021-06-12 19:40:20,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:40:20,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:20,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:40:20,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:40:20,592 INFO L87 Difference]: Start difference. First operand 1650 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:40:20,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:20,845 INFO L93 Difference]: Finished difference Result 1674 states and 5294 transitions. [2021-06-12 19:40:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:40:20,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-06-12 19:40:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:20,847 INFO L225 Difference]: With dead ends: 1674 [2021-06-12 19:40:20,847 INFO L226 Difference]: Without dead ends: 1661 [2021-06-12 19:40:20,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:40:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-12 19:40:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1650. [2021-06-12 19:40:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.1861734384475437) internal successors, (5254), 1649 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5254 transitions. [2021-06-12 19:40:20,863 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5254 transitions. Word has length 19 [2021-06-12 19:40:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:20,863 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5254 transitions. [2021-06-12 19:40:20,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:40:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5254 transitions. [2021-06-12 19:40:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:20,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:20,865 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:21,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20583,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:21,065 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:21,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1558288827, now seen corresponding path program 203 times [2021-06-12 19:40:21,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:21,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393195719] [2021-06-12 19:40:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:40:21,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:21,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393195719] [2021-06-12 19:40:21,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393195719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:21,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108070273] [2021-06-12 19:40:21,162 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 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 [2021-06-12 19:40:21,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:40:21,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:21,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:21,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:21,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:21,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:21,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:21,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:21,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:40:21,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:40:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:21,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108070273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:21,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:21,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:40:21,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529305013] [2021-06-12 19:40:21,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:40:21,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:21,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:40:21,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:40:21,861 INFO L87 Difference]: Start difference. First operand 1650 states and 5254 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:40:22,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:22,166 INFO L93 Difference]: Finished difference Result 1675 states and 5302 transitions. [2021-06-12 19:40:22,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:40:22,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-06-12 19:40:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:22,168 INFO L225 Difference]: With dead ends: 1675 [2021-06-12 19:40:22,168 INFO L226 Difference]: Without dead ends: 1666 [2021-06-12 19:40:22,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:40:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-06-12 19:40:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1652. [2021-06-12 19:40:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 3.1859479103573594) internal successors, (5260), 1651 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 5260 transitions. [2021-06-12 19:40:22,185 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 5260 transitions. Word has length 19 [2021-06-12 19:40:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:22,185 INFO L482 AbstractCegarLoop]: Abstraction has 1652 states and 5260 transitions. [2021-06-12 19:40:22,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:40:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 5260 transitions. [2021-06-12 19:40:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:22,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:22,187 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:22,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20834,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:22,387 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:22,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1993095109, now seen corresponding path program 204 times [2021-06-12 19:40:22,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:22,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997161996] [2021-06-12 19:40:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:40:22,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:22,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997161996] [2021-06-12 19:40:22,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997161996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:22,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276718263] [2021-06-12 19:40:22,480 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 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 [2021-06-12 19:40:22,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:40:22,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:22,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:22,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:22,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:22,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:23,583 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 251 [2021-06-12 19:40:24,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:24,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:24,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:25,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:25,640 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:25,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:25,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:25,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276718263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:25,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:25,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:40:25,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761478802] [2021-06-12 19:40:25,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:40:25,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:40:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:40:25,669 INFO L87 Difference]: Start difference. First operand 1652 states and 5260 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:40:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:26,067 INFO L93 Difference]: Finished difference Result 1724 states and 5414 transitions. [2021-06-12 19:40:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:40:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-06-12 19:40:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:26,069 INFO L225 Difference]: With dead ends: 1724 [2021-06-12 19:40:26,069 INFO L226 Difference]: Without dead ends: 1714 [2021-06-12 19:40:26,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 335.6ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:40:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-12 19:40:26,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-06-12 19:40:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-12 19:40:26,087 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-12 19:40:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:26,087 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-12 19:40:26,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:40:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-12 19:40:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:26,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:26,088 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:26,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20930,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:26,289 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:26,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:26,289 INFO L82 PathProgramCache]: Analyzing trace with hash -218856773, now seen corresponding path program 205 times [2021-06-12 19:40:26,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:26,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592516502] [2021-06-12 19:40:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:26,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:26,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592516502] [2021-06-12 19:40:26,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592516502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:26,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397615015] [2021-06-12 19:40:26,408 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 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 [2021-06-12 19:40:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:26,432 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:26,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:26,794 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 19:40:26,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:26,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:28,292 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 238 [2021-06-12 19:40:28,455 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 321 [2021-06-12 19:40:28,953 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 230 [2021-06-12 19:40:29,502 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 212 [2021-06-12 19:40:29,644 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-06-12 19:40:29,785 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-06-12 19:40:29,941 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 321 [2021-06-12 19:40:30,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:30,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:30,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:31,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:31,263 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:31,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:31,264 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:31,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397615015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:31,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:31,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:40:31,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796703637] [2021-06-12 19:40:31,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:40:31,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:31,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:40:31,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:40:31,291 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:40:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:31,991 INFO L93 Difference]: Finished difference Result 1757 states and 5501 transitions. [2021-06-12 19:40:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:40:31,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:40:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:31,993 INFO L225 Difference]: With dead ends: 1757 [2021-06-12 19:40:31,993 INFO L226 Difference]: Without dead ends: 1747 [2021-06-12 19:40:31,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 755.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:40:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-06-12 19:40:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1651. [2021-06-12 19:40:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-12 19:40:32,011 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-12 19:40:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:32,011 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-12 19:40:32,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:40:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-12 19:40:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:32,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:32,013 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:32,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21384,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:32,214 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:32,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:32,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1486313951, now seen corresponding path program 206 times [2021-06-12 19:40:32,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:32,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764283608] [2021-06-12 19:40:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:32,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:32,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764283608] [2021-06-12 19:40:32,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764283608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:32,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046948654] [2021-06-12 19:40:32,318 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 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 [2021-06-12 19:40:32,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:40:32,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:32,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:32,732 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 19:40:32,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:32,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:33,476 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 257 [2021-06-12 19:40:34,039 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-06-12 19:40:34,218 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-06-12 19:40:34,442 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 335 [2021-06-12 19:40:34,708 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 392 [2021-06-12 19:40:35,487 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 149 [2021-06-12 19:40:35,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:35,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:35,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:35,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:35,990 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:35,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:35,991 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:36,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046948654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:36,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:36,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:40:36,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396318798] [2021-06-12 19:40:36,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:40:36,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:36,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:40:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:40:36,018 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:36,736 INFO L93 Difference]: Finished difference Result 1826 states and 5698 transitions. [2021-06-12 19:40:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:40:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:40:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:36,738 INFO L225 Difference]: With dead ends: 1826 [2021-06-12 19:40:36,739 INFO L226 Difference]: Without dead ends: 1816 [2021-06-12 19:40:36,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:40:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-06-12 19:40:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1651. [2021-06-12 19:40:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-12 19:40:36,756 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-12 19:40:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:36,756 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-12 19:40:36,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-12 19:40:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:36,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:36,758 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:36,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21887,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:36,959 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:36,959 INFO L82 PathProgramCache]: Analyzing trace with hash 258970085, now seen corresponding path program 207 times [2021-06-12 19:40:36,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:36,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501703979] [2021-06-12 19:40:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:37,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:37,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501703979] [2021-06-12 19:40:37,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501703979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:37,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430445666] [2021-06-12 19:40:37,104 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 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 [2021-06-12 19:40:37,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:40:37,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:37,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:37,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:37,517 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 19:40:37,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:37,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:38,009 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 199 [2021-06-12 19:40:38,697 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 248 [2021-06-12 19:40:39,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:39,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:39,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:40,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:40,050 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:40,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:40,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:40,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430445666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:40,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:40,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:40:40,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037595396] [2021-06-12 19:40:40,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:40:40,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:40,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:40:40,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:40:40,079 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:40,825 INFO L93 Difference]: Finished difference Result 1724 states and 5388 transitions. [2021-06-12 19:40:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:40:40,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:40:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:40,827 INFO L225 Difference]: With dead ends: 1724 [2021-06-12 19:40:40,827 INFO L226 Difference]: Without dead ends: 1714 [2021-06-12 19:40:40,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 901.1ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:40:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-12 19:40:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-06-12 19:40:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-12 19:40:40,844 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-12 19:40:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:40,844 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-12 19:40:40,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-12 19:40:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:40,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:40,846 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:41,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22338 [2021-06-12 19:40:41,061 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -891850757, now seen corresponding path program 208 times [2021-06-12 19:40:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:41,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959743223] [2021-06-12 19:40:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:41,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:41,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959743223] [2021-06-12 19:40:41,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959743223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:41,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189904926] [2021-06-12 19:40:41,178 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 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 [2021-06-12 19:40:41,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:40:41,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:41,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:41,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:41,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:41,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:41,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:41,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:40:41,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:40:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:41,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189904926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:41,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:41,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:40:41,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635036650] [2021-06-12 19:40:41,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:40:41,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:41,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:40:41,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:40:41,937 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:40:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:42,401 INFO L93 Difference]: Finished difference Result 1678 states and 5309 transitions. [2021-06-12 19:40:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:40:42,401 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:40:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:42,403 INFO L225 Difference]: With dead ends: 1678 [2021-06-12 19:40:42,403 INFO L226 Difference]: Without dead ends: 1669 [2021-06-12 19:40:42,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 400.6ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:40:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-12 19:40:42,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1651. [2021-06-12 19:40:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-06-12 19:40:42,421 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-06-12 19:40:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:42,421 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-06-12 19:40:42,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:40:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-06-12 19:40:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:42,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:42,422 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:42,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22765 [2021-06-12 19:40:42,623 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:42,623 INFO L82 PathProgramCache]: Analyzing trace with hash -148267397, now seen corresponding path program 209 times [2021-06-12 19:40:42,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:42,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69603181] [2021-06-12 19:40:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:40:42,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69603181] [2021-06-12 19:40:42,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69603181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163136296] [2021-06-12 19:40:42,725 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 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 [2021-06-12 19:40:42,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:40:42,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:42,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:42,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:43,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:43,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:44,245 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 214 [2021-06-12 19:40:45,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:45,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:45,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:45,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:45,530 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:45,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:45,531 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:45,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163136296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:45,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:45,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:40:45,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928347333] [2021-06-12 19:40:45,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:40:45,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:40:45,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:40:45,560 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:40:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:46,203 INFO L93 Difference]: Finished difference Result 1770 states and 5538 transitions. [2021-06-12 19:40:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:40:46,204 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 19 [2021-06-12 19:40:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:46,206 INFO L225 Difference]: With dead ends: 1770 [2021-06-12 19:40:46,206 INFO L226 Difference]: Without dead ends: 1760 [2021-06-12 19:40:46,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:40:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-06-12 19:40:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1651. [2021-06-12 19:40:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-06-12 19:40:46,224 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-06-12 19:40:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:46,224 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-06-12 19:40:46,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:40:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-06-12 19:40:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:46,225 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:46,225 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:46,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22875,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:46,426 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:46,426 INFO L82 PathProgramCache]: Analyzing trace with hash 702876735, now seen corresponding path program 210 times [2021-06-12 19:40:46,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:46,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389393789] [2021-06-12 19:40:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:46,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:46,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389393789] [2021-06-12 19:40:46,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389393789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:46,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210872513] [2021-06-12 19:40:46,527 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 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 [2021-06-12 19:40:46,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:40:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:46,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:46,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:46,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:49,132 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 400 [2021-06-12 19:40:49,510 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-06-12 19:40:49,794 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-06-12 19:40:50,120 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 442 [2021-06-12 19:40:50,353 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 361 [2021-06-12 19:40:50,520 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 218 [2021-06-12 19:40:51,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:51,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:51,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:51,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:51,546 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:51,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:51,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:51,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210872513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:51,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:51,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:40:51,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986285651] [2021-06-12 19:40:51,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:40:51,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:51,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:40:51,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:40:51,573 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:40:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:52,319 INFO L93 Difference]: Finished difference Result 1871 states and 5788 transitions. [2021-06-12 19:40:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 19:40:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 19 [2021-06-12 19:40:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:52,322 INFO L225 Difference]: With dead ends: 1871 [2021-06-12 19:40:52,322 INFO L226 Difference]: Without dead ends: 1861 [2021-06-12 19:40:52,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 620.5ms TimeCoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:40:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-06-12 19:40:52,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1631. [2021-06-12 19:40:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.1846625766871166) internal successors, (5191), 1630 states have internal predecessors, (5191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5191 transitions. [2021-06-12 19:40:52,350 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5191 transitions. Word has length 19 [2021-06-12 19:40:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:52,350 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5191 transitions. [2021-06-12 19:40:52,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:40:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5191 transitions. [2021-06-12 19:40:52,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:52,351 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:52,351 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:52,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23189 [2021-06-12 19:40:52,552 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:52,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1318541051, now seen corresponding path program 211 times [2021-06-12 19:40:52,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:52,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568436956] [2021-06-12 19:40:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:52,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:52,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568436956] [2021-06-12 19:40:52,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568436956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:52,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401984216] [2021-06-12 19:40:52,671 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 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 [2021-06-12 19:40:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:52,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:52,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:53,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:53,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:40:54,569 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 229 [2021-06-12 19:40:54,927 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-06-12 19:40:55,122 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-06-12 19:40:55,348 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 383 [2021-06-12 19:40:55,524 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 438 [2021-06-12 19:40:55,718 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 244 [2021-06-12 19:40:56,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:40:56,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:56,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:40:57,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:40:57,152 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:40:57,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:40:57,153 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:40:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:40:57,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401984216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:57,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:40:57,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:40:57,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849171500] [2021-06-12 19:40:57,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:40:57,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:40:57,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:40:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:40:57,180 INFO L87 Difference]: Start difference. First operand 1631 states and 5191 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:58,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:40:58,169 INFO L93 Difference]: Finished difference Result 1825 states and 5631 transitions. [2021-06-12 19:40:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 19:40:58,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:40:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:40:58,171 INFO L225 Difference]: With dead ends: 1825 [2021-06-12 19:40:58,171 INFO L226 Difference]: Without dead ends: 1813 [2021-06-12 19:40:58,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 844.5ms TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 19:40:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-06-12 19:40:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1647. [2021-06-12 19:40:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1883353584447143) internal successors, (5248), 1646 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:40:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5248 transitions. [2021-06-12 19:40:58,189 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5248 transitions. Word has length 19 [2021-06-12 19:40:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:40:58,189 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5248 transitions. [2021-06-12 19:40:58,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:40:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5248 transitions. [2021-06-12 19:40:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:40:58,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:40:58,191 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:40:58,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23825,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:40:58,391 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:40:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:40:58,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1070701633, now seen corresponding path program 212 times [2021-06-12 19:40:58,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:40:58,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650370989] [2021-06-12 19:40:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:40:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:40:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:40:58,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:40:58,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650370989] [2021-06-12 19:40:58,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650370989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:40:58,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722633926] [2021-06-12 19:40:58,494 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 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 [2021-06-12 19:40:58,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:40:58,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:40:58,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:40:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:40:58,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:40:58,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:00,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:00,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:00,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:00,869 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 232 [2021-06-12 19:41:01,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:01,519 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:01,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:01,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:01,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722633926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:01,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:01,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:41:01,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252953636] [2021-06-12 19:41:01,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:41:01,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:01,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:41:01,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:41:01,560 INFO L87 Difference]: Start difference. First operand 1647 states and 5248 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:02,383 INFO L93 Difference]: Finished difference Result 1792 states and 5550 transitions. [2021-06-12 19:41:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:41:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:41:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:02,386 INFO L225 Difference]: With dead ends: 1792 [2021-06-12 19:41:02,386 INFO L226 Difference]: Without dead ends: 1780 [2021-06-12 19:41:02,386 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 808.7ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 19:41:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-06-12 19:41:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1649. [2021-06-12 19:41:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.183859223300971) internal successors, (5247), 1648 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5247 transitions. [2021-06-12 19:41:02,403 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5247 transitions. Word has length 19 [2021-06-12 19:41:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:02,404 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5247 transitions. [2021-06-12 19:41:02,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5247 transitions. [2021-06-12 19:41:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:02,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:02,405 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:02,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24317,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:02,606 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:02,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2122780805, now seen corresponding path program 213 times [2021-06-12 19:41:02,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:02,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902426063] [2021-06-12 19:41:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:02,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:02,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902426063] [2021-06-12 19:41:02,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902426063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:02,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122155060] [2021-06-12 19:41:02,709 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 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 [2021-06-12 19:41:02,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:41:02,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:02,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:02,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:03,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:03,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:03,853 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 262 [2021-06-12 19:41:04,100 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 329 [2021-06-12 19:41:04,219 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 282 [2021-06-12 19:41:04,350 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 246 [2021-06-12 19:41:05,239 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 276 [2021-06-12 19:41:05,388 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 304 [2021-06-12 19:41:05,670 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 354 [2021-06-12 19:41:06,060 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 452 [2021-06-12 19:41:06,507 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 492 [2021-06-12 19:41:07,042 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-06-12 19:41:07,574 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-06-12 19:41:08,136 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 540 [2021-06-12 19:41:08,454 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 427 [2021-06-12 19:41:08,707 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 310 [2021-06-12 19:41:09,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:09,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:09,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:09,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:09,455 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:09,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:09,455 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:09,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122155060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:09,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:09,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:41:09,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056926060] [2021-06-12 19:41:09,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:41:09,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:09,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:41:09,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:41:09,484 INFO L87 Difference]: Start difference. First operand 1649 states and 5247 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:10,286 INFO L93 Difference]: Finished difference Result 1801 states and 5581 transitions. [2021-06-12 19:41:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:41:10,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:41:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:10,288 INFO L225 Difference]: With dead ends: 1801 [2021-06-12 19:41:10,288 INFO L226 Difference]: Without dead ends: 1791 [2021-06-12 19:41:10,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 816.4ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:41:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-12 19:41:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1647. [2021-06-12 19:41:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1859052247873634) internal successors, (5244), 1646 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5244 transitions. [2021-06-12 19:41:10,305 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5244 transitions. Word has length 19 [2021-06-12 19:41:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:10,305 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5244 transitions. [2021-06-12 19:41:10,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5244 transitions. [2021-06-12 19:41:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:10,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:10,307 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:10,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24781,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:10,507 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:10,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1987737538, now seen corresponding path program 214 times [2021-06-12 19:41:10,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:10,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146331006] [2021-06-12 19:41:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:10,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146331006] [2021-06-12 19:41:10,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146331006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887636851] [2021-06-12 19:41:10,549 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 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 [2021-06-12 19:41:10,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:41:10,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:10,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:41:10,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:10,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887636851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:10,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:10,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:41:10,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937710202] [2021-06-12 19:41:10,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:41:10,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:10,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:41:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:41:10,605 INFO L87 Difference]: Start difference. First operand 1647 states and 5244 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:41:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:10,703 INFO L93 Difference]: Finished difference Result 2586 states and 8045 transitions. [2021-06-12 19:41:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:41:10,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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 19 [2021-06-12 19:41:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:10,705 INFO L225 Difference]: With dead ends: 2586 [2021-06-12 19:41:10,706 INFO L226 Difference]: Without dead ends: 2586 [2021-06-12 19:41:10,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:41:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-12 19:41:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2300. [2021-06-12 19:41:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-06-12 19:41:10,731 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-06-12 19:41:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:10,731 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-06-12 19:41:10,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:41:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-06-12 19:41:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:10,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:10,733 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:10,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25315 [2021-06-12 19:41:10,933 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:10,933 INFO L82 PathProgramCache]: Analyzing trace with hash -377496769, now seen corresponding path program 215 times [2021-06-12 19:41:10,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:10,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829171038] [2021-06-12 19:41:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:11,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:11,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829171038] [2021-06-12 19:41:11,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829171038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:11,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663070971] [2021-06-12 19:41:11,054 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 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 [2021-06-12 19:41:11,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:41:11,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:11,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:11,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:11,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:12,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:13,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:13,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:13,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:13,248 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:13,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:13,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663070971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:13,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:13,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:41:13,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872310523] [2021-06-12 19:41:13,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:41:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:41:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:41:13,275 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:13,994 INFO L93 Difference]: Finished difference Result 2369 states and 7524 transitions. [2021-06-12 19:41:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:41:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:41:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:13,996 INFO L225 Difference]: With dead ends: 2369 [2021-06-12 19:41:13,996 INFO L226 Difference]: Without dead ends: 2359 [2021-06-12 19:41:13,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 824.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:41:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-12 19:41:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2300. [2021-06-12 19:41:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-06-12 19:41:14,020 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-06-12 19:41:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:14,020 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-06-12 19:41:14,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-06-12 19:41:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:14,022 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:14,022 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:14,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25316 [2021-06-12 19:41:14,222 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:14,223 INFO L82 PathProgramCache]: Analyzing trace with hash -504602600, now seen corresponding path program 216 times [2021-06-12 19:41:14,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:14,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163941499] [2021-06-12 19:41:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:14,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:14,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163941499] [2021-06-12 19:41:14,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163941499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:14,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028877489] [2021-06-12 19:41:14,264 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 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 [2021-06-12 19:41:14,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:41:14,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:41:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:14,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028877489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:14,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:14,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:41:14,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612800898] [2021-06-12 19:41:14,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:41:14,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:14,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:41:14,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:41:14,320 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:41:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:14,462 INFO L93 Difference]: Finished difference Result 2557 states and 7954 transitions. [2021-06-12 19:41:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:41:14,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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 19 [2021-06-12 19:41:14,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:14,465 INFO L225 Difference]: With dead ends: 2557 [2021-06-12 19:41:14,465 INFO L226 Difference]: Without dead ends: 2557 [2021-06-12 19:41:14,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:41:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-06-12 19:41:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2355. [2021-06-12 19:41:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.2196261682242993) internal successors, (7579), 2354 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7579 transitions. [2021-06-12 19:41:14,490 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7579 transitions. Word has length 19 [2021-06-12 19:41:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:14,490 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 7579 transitions. [2021-06-12 19:41:14,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:41:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7579 transitions. [2021-06-12 19:41:14,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:14,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:14,491 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:14,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25586,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:14,692 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2108266501, now seen corresponding path program 217 times [2021-06-12 19:41:14,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:14,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641329895] [2021-06-12 19:41:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:14,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:14,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641329895] [2021-06-12 19:41:14,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641329895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:14,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126677562] [2021-06-12 19:41:14,796 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 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 [2021-06-12 19:41:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:14,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:14,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:15,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:15,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:15,889 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 337 [2021-06-12 19:41:16,066 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-06-12 19:41:16,227 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-06-12 19:41:16,421 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 362 [2021-06-12 19:41:16,650 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 418 [2021-06-12 19:41:16,991 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 474 [2021-06-12 19:41:17,512 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 249 [2021-06-12 19:41:18,174 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 251 [2021-06-12 19:41:18,387 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 340 [2021-06-12 19:41:18,633 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 349 [2021-06-12 19:41:18,998 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 738 DAG size of output: 447 [2021-06-12 19:41:19,479 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-06-12 19:41:19,957 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-06-12 19:41:20,486 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 526 [2021-06-12 19:41:21,277 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 454 [2021-06-12 19:41:21,400 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-12 19:41:22,431 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-06-12 19:41:22,566 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-06-12 19:41:22,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:22,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:22,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:23,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:23,488 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:23,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:23,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:23,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126677562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:23,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:23,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:41:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613667143] [2021-06-12 19:41:23,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:41:23,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:41:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:41:23,517 INFO L87 Difference]: Start difference. First operand 2355 states and 7579 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:24,235 INFO L93 Difference]: Finished difference Result 2414 states and 7678 transitions. [2021-06-12 19:41:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:41:24,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:41:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:24,237 INFO L225 Difference]: With dead ends: 2414 [2021-06-12 19:41:24,237 INFO L226 Difference]: Without dead ends: 2404 [2021-06-12 19:41:24,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 871.2ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:41:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-12 19:41:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2357. [2021-06-12 19:41:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 3.2181663837011882) internal successors, (7582), 2356 states have internal predecessors, (7582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7582 transitions. [2021-06-12 19:41:24,262 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7582 transitions. Word has length 19 [2021-06-12 19:41:24,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:24,262 INFO L482 AbstractCegarLoop]: Abstraction has 2357 states and 7582 transitions. [2021-06-12 19:41:24,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7582 transitions. [2021-06-12 19:41:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:24,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:24,264 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:24,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25587 [2021-06-12 19:41:24,464 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:24,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1772059778, now seen corresponding path program 218 times [2021-06-12 19:41:24,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:24,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175345732] [2021-06-12 19:41:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:24,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:24,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175345732] [2021-06-12 19:41:24,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175345732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:24,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555051848] [2021-06-12 19:41:24,510 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 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 [2021-06-12 19:41:24,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:41:24,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:24,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:41:24,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:24,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555051848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:24,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:24,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:41:24,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876677856] [2021-06-12 19:41:24,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:41:24,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:24,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:41:24,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:41:24,578 INFO L87 Difference]: Start difference. First operand 2357 states and 7582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:41:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:24,758 INFO L93 Difference]: Finished difference Result 2614 states and 8095 transitions. [2021-06-12 19:41:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:41:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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 19 [2021-06-12 19:41:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:24,761 INFO L225 Difference]: With dead ends: 2614 [2021-06-12 19:41:24,761 INFO L226 Difference]: Without dead ends: 2614 [2021-06-12 19:41:24,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:41:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-06-12 19:41:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2378. [2021-06-12 19:41:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 3.216238956668069) internal successors, (7645), 2377 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 7645 transitions. [2021-06-12 19:41:24,786 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 7645 transitions. Word has length 19 [2021-06-12 19:41:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:24,786 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 7645 transitions. [2021-06-12 19:41:24,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:41:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 7645 transitions. [2021-06-12 19:41:24,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:24,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:24,788 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:24,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26380,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:24,988 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:24,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1053335259, now seen corresponding path program 219 times [2021-06-12 19:41:24,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:24,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845661697] [2021-06-12 19:41:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:25,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:25,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845661697] [2021-06-12 19:41:25,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845661697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:25,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554071580] [2021-06-12 19:41:25,119 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 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 [2021-06-12 19:41:25,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:41:25,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:25,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-12 19:41:25,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:25,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:25,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:25,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:25,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:25,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:41:25,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:41:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:25,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554071580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:25,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:25,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:41:25,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768394928] [2021-06-12 19:41:25,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:41:25,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:25,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:41:25,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:41:25,663 INFO L87 Difference]: Start difference. First operand 2378 states and 7645 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:26,068 INFO L93 Difference]: Finished difference Result 2419 states and 7720 transitions. [2021-06-12 19:41:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:41:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:41:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:26,071 INFO L225 Difference]: With dead ends: 2419 [2021-06-12 19:41:26,071 INFO L226 Difference]: Without dead ends: 2404 [2021-06-12 19:41:26,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:41:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-12 19:41:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-06-12 19:41:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.2147058823529413) internal successors, (7651), 2380 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 7651 transitions. [2021-06-12 19:41:26,096 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 7651 transitions. Word has length 19 [2021-06-12 19:41:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:26,096 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 7651 transitions. [2021-06-12 19:41:26,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 7651 transitions. [2021-06-12 19:41:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:26,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:26,098 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:26,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26381,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:26,298 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:26,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:26,299 INFO L82 PathProgramCache]: Analyzing trace with hash -201001835, now seen corresponding path program 220 times [2021-06-12 19:41:26,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:26,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467795725] [2021-06-12 19:41:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:26,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:26,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467795725] [2021-06-12 19:41:26,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467795725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:26,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053737878] [2021-06-12 19:41:26,405 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 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 [2021-06-12 19:41:26,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:41:26,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:26,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:26,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:26,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:26,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:27,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:27,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:27,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:41:27,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:41:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:27,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053737878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:27,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:27,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:41:27,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599988066] [2021-06-12 19:41:27,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:41:27,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:41:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:41:27,389 INFO L87 Difference]: Start difference. First operand 2381 states and 7651 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:27,899 INFO L93 Difference]: Finished difference Result 2420 states and 7731 transitions. [2021-06-12 19:41:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:41:27,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:41:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:27,902 INFO L225 Difference]: With dead ends: 2420 [2021-06-12 19:41:27,902 INFO L226 Difference]: Without dead ends: 2411 [2021-06-12 19:41:27,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 369.0ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:41:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-12 19:41:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2384. [2021-06-12 19:41:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.214435585396559) internal successors, (7660), 2383 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 7660 transitions. [2021-06-12 19:41:27,929 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 7660 transitions. Word has length 19 [2021-06-12 19:41:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:27,929 INFO L482 AbstractCegarLoop]: Abstraction has 2384 states and 7660 transitions. [2021-06-12 19:41:27,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 7660 transitions. [2021-06-12 19:41:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:27,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:27,930 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:28,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26477,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:28,141 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:28,141 INFO L82 PathProgramCache]: Analyzing trace with hash 542581525, now seen corresponding path program 221 times [2021-06-12 19:41:28,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:28,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454512127] [2021-06-12 19:41:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:28,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:28,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454512127] [2021-06-12 19:41:28,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454512127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:28,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356977390] [2021-06-12 19:41:28,272 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 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 [2021-06-12 19:41:28,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:41:28,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:28,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:28,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:28,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:29,960 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 312 [2021-06-12 19:41:30,133 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-06-12 19:41:30,305 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-06-12 19:41:30,511 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 338 [2021-06-12 19:41:30,798 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 384 [2021-06-12 19:41:31,088 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 203 [2021-06-12 19:41:31,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:31,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:31,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:32,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:32,371 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:32,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:32,371 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:32,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356977390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:32,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:32,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:41:32,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330718572] [2021-06-12 19:41:32,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:41:32,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:32,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:41:32,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:41:32,400 INFO L87 Difference]: Start difference. First operand 2384 states and 7660 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:32,789 INFO L93 Difference]: Finished difference Result 2508 states and 7952 transitions. [2021-06-12 19:41:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:41:32,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:41:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:32,792 INFO L225 Difference]: With dead ends: 2508 [2021-06-12 19:41:32,792 INFO L226 Difference]: Without dead ends: 2498 [2021-06-12 19:41:32,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 359.9ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:41:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-12 19:41:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2382. [2021-06-12 19:41:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-06-12 19:41:32,817 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-06-12 19:41:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:32,817 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-06-12 19:41:32,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-06-12 19:41:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:32,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:32,819 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:33,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26589 [2021-06-12 19:41:33,020 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1500320577, now seen corresponding path program 222 times [2021-06-12 19:41:33,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:33,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538313787] [2021-06-12 19:41:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:33,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:33,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538313787] [2021-06-12 19:41:33,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538313787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:33,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855482513] [2021-06-12 19:41:33,123 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 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 [2021-06-12 19:41:33,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:41:33,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:33,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:33,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:33,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:33,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:34,489 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 239 [2021-06-12 19:41:34,688 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 244 [2021-06-12 19:41:34,791 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 269 [2021-06-12 19:41:34,940 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 240 [2021-06-12 19:41:35,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:35,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:35,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:36,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:36,103 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:36,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:36,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:36,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855482513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:36,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:36,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:41:36,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404160825] [2021-06-12 19:41:36,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:41:36,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:36,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:41:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:41:36,131 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:36,956 INFO L93 Difference]: Finished difference Result 2503 states and 7954 transitions. [2021-06-12 19:41:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:41:36,956 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:41:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:36,959 INFO L225 Difference]: With dead ends: 2503 [2021-06-12 19:41:36,959 INFO L226 Difference]: Without dead ends: 2493 [2021-06-12 19:41:36,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 891.6ms TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:41:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-06-12 19:41:36,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2382. [2021-06-12 19:41:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-06-12 19:41:36,984 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-06-12 19:41:36,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:36,985 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-06-12 19:41:36,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-06-12 19:41:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:36,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:36,986 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:37,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27140 [2021-06-12 19:41:37,187 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:37,187 INFO L82 PathProgramCache]: Analyzing trace with hash -440749611, now seen corresponding path program 223 times [2021-06-12 19:41:37,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:37,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945052423] [2021-06-12 19:41:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:41:37,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:37,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945052423] [2021-06-12 19:41:37,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945052423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:37,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122634340] [2021-06-12 19:41:37,286 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 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 [2021-06-12 19:41:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:37,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:37,648 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 19:41:37,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:37,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:38,729 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 210 [2021-06-12 19:41:38,847 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-06-12 19:41:38,964 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-06-12 19:41:39,097 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 244 [2021-06-12 19:41:39,230 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 241 [2021-06-12 19:41:39,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:39,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:39,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:40,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:40,335 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:40,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:40,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:40,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122634340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:40,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:40,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:41:40,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600056117] [2021-06-12 19:41:40,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:41:40,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:41:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:41:40,361 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:41:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:41,201 INFO L93 Difference]: Finished difference Result 2624 states and 8231 transitions. [2021-06-12 19:41:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:41:41,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-06-12 19:41:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:41,205 INFO L225 Difference]: With dead ends: 2624 [2021-06-12 19:41:41,205 INFO L226 Difference]: Without dead ends: 2612 [2021-06-12 19:41:41,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:41:41,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-12 19:41:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2395. [2021-06-12 19:41:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:41,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-12 19:41:41,244 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-12 19:41:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:41,245 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-12 19:41:41,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-06-12 19:41:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-12 19:41:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:41,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:41,246 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:41,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27516 [2021-06-12 19:41:41,447 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:41,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2136787431, now seen corresponding path program 224 times [2021-06-12 19:41:41,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:41,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590282262] [2021-06-12 19:41:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:41,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:41,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590282262] [2021-06-12 19:41:41,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590282262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:41,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490551796] [2021-06-12 19:41:41,552 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 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 [2021-06-12 19:41:41,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:41:41,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:41,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:41,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:41,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:42,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:42,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:42,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:43,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:43,722 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:43,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:43,722 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:43,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490551796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:43,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:43,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:41:43,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992304188] [2021-06-12 19:41:43,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:41:43,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:43,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:41:43,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:41:43,749 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:44,566 INFO L93 Difference]: Finished difference Result 2495 states and 7900 transitions. [2021-06-12 19:41:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:41:44,566 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:41:44,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:44,568 INFO L225 Difference]: With dead ends: 2495 [2021-06-12 19:41:44,568 INFO L226 Difference]: Without dead ends: 2485 [2021-06-12 19:41:44,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:41:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-12 19:41:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2395. [2021-06-12 19:41:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-12 19:41:44,594 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-12 19:41:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:44,594 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-12 19:41:44,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-12 19:41:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:44,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:44,596 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:44,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27878 [2021-06-12 19:41:44,797 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash 427410133, now seen corresponding path program 225 times [2021-06-12 19:41:44,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:44,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169604742] [2021-06-12 19:41:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:44,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:44,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169604742] [2021-06-12 19:41:44,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169604742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:44,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583424520] [2021-06-12 19:41:44,899 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 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 [2021-06-12 19:41:44,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:41:44,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:44,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:44,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:45,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:45,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:45,755 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-12 19:41:45,946 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 295 [2021-06-12 19:41:46,052 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 295 [2021-06-12 19:41:46,183 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 306 [2021-06-12 19:41:46,321 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 300 [2021-06-12 19:41:46,431 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 295 [2021-06-12 19:41:47,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:47,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:47,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:48,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:48,244 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:48,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:48,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:48,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583424520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:48,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:48,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:41:48,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194560632] [2021-06-12 19:41:48,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:41:48,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:48,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:41:48,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:41:48,272 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:49,097 INFO L93 Difference]: Finished difference Result 2453 states and 7797 transitions. [2021-06-12 19:41:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:41:49,097 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:41:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:49,100 INFO L225 Difference]: With dead ends: 2453 [2021-06-12 19:41:49,100 INFO L226 Difference]: Without dead ends: 2443 [2021-06-12 19:41:49,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 932.9ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:41:49,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-12 19:41:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2395. [2021-06-12 19:41:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-12 19:41:49,125 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-12 19:41:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:49,125 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-12 19:41:49,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:41:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-12 19:41:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:49,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:49,127 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:49,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28250,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:49,341 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:49,341 INFO L82 PathProgramCache]: Analyzing trace with hash -906777413, now seen corresponding path program 226 times [2021-06-12 19:41:49,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:49,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691379257] [2021-06-12 19:41:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:49,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:49,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691379257] [2021-06-12 19:41:49,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691379257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:49,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867252524] [2021-06-12 19:41:49,457 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 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 [2021-06-12 19:41:49,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:41:49,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:49,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:49,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:49,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:50,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:50,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:50,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:41:50,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-12 19:41:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:50,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867252524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:50,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:50,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:41:50,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643565785] [2021-06-12 19:41:50,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:41:50,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:41:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:41:50,737 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:51,155 INFO L93 Difference]: Finished difference Result 2431 states and 7773 transitions. [2021-06-12 19:41:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:41:51,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:41:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:51,158 INFO L225 Difference]: With dead ends: 2431 [2021-06-12 19:41:51,158 INFO L226 Difference]: Without dead ends: 2422 [2021-06-12 19:41:51,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:41:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-12 19:41:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2396. [2021-06-12 19:41:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 3.215866388308977) internal successors, (7702), 2395 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7702 transitions. [2021-06-12 19:41:51,184 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7702 transitions. Word has length 19 [2021-06-12 19:41:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:51,184 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7702 transitions. [2021-06-12 19:41:51,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7702 transitions. [2021-06-12 19:41:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:51,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:51,186 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:51,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28650 [2021-06-12 19:41:51,386 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:51,386 INFO L82 PathProgramCache]: Analyzing trace with hash -163194053, now seen corresponding path program 227 times [2021-06-12 19:41:51,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:51,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829987264] [2021-06-12 19:41:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:51,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:51,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829987264] [2021-06-12 19:41:51,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829987264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:51,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628478412] [2021-06-12 19:41:51,499 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 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 [2021-06-12 19:41:51,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:41:51,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:51,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:51,821 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 19:41:51,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:51,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:52,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:52,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:53,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:53,137 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:53,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:53,137 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:53,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628478412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:53,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:53,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:41:53,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903656113] [2021-06-12 19:41:53,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:41:53,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:41:53,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:41:53,166 INFO L87 Difference]: Start difference. First operand 2396 states and 7702 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:53,923 INFO L93 Difference]: Finished difference Result 2570 states and 8139 transitions. [2021-06-12 19:41:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:41:53,923 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:41:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:53,926 INFO L225 Difference]: With dead ends: 2570 [2021-06-12 19:41:53,926 INFO L226 Difference]: Without dead ends: 2560 [2021-06-12 19:41:53,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:41:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-12 19:41:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2395. [2021-06-12 19:41:53,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-12 19:41:53,951 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-12 19:41:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:53,952 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-12 19:41:53,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-12 19:41:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:53,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:53,953 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:54,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28834,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:54,154 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:54,154 INFO L82 PathProgramCache]: Analyzing trace with hash 687950079, now seen corresponding path program 228 times [2021-06-12 19:41:54,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:54,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667189952] [2021-06-12 19:41:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:54,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:54,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667189952] [2021-06-12 19:41:54,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667189952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:54,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134497421] [2021-06-12 19:41:54,250 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 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 [2021-06-12 19:41:54,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:41:54,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:54,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:54,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:54,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:54,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:55,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:55,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:55,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:41:56,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:41:56,485 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:41:56,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:41:56,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:41:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:56,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134497421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:56,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:56,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:41:56,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338390967] [2021-06-12 19:41:56,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:41:56,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:56,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:41:56,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:41:56,512 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:57,457 INFO L93 Difference]: Finished difference Result 2690 states and 8440 transitions. [2021-06-12 19:41:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 19:41:57,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:41:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:57,460 INFO L225 Difference]: With dead ends: 2690 [2021-06-12 19:41:57,460 INFO L226 Difference]: Without dead ends: 2680 [2021-06-12 19:41:57,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 753.7ms TimeCoverageRelationStatistics Valid=289, Invalid=2363, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:41:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-12 19:41:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2245. [2021-06-12 19:41:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.2076648841354722) internal successors, (7198), 2244 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7198 transitions. [2021-06-12 19:41:57,485 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7198 transitions. Word has length 19 [2021-06-12 19:41:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:57,485 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7198 transitions. [2021-06-12 19:41:57,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:41:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7198 transitions. [2021-06-12 19:41:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:57,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:57,487 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:57,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29092 [2021-06-12 19:41:57,687 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:57,688 INFO L82 PathProgramCache]: Analyzing trace with hash 26686296, now seen corresponding path program 229 times [2021-06-12 19:41:57,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:57,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811619017] [2021-06-12 19:41:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:57,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811619017] [2021-06-12 19:41:57,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811619017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714177414] [2021-06-12 19:41:57,723 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 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 [2021-06-12 19:41:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:57,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:41:57,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:41:57,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714177414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:57,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:41:57,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:41:57,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368451506] [2021-06-12 19:41:57,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:41:57,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:41:57,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:41:57,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:41:57,775 INFO L87 Difference]: Start difference. First operand 2245 states and 7198 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:41:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:41:57,847 INFO L93 Difference]: Finished difference Result 2914 states and 8965 transitions. [2021-06-12 19:41:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:41:57,847 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 [2021-06-12 19:41:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:41:57,850 INFO L225 Difference]: With dead ends: 2914 [2021-06-12 19:41:57,850 INFO L226 Difference]: Without dead ends: 2914 [2021-06-12 19:41:57,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:41:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-06-12 19:41:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2672. [2021-06-12 19:41:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 3.2100336952452264) internal successors, (8574), 2671 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:41:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 8574 transitions. [2021-06-12 19:41:57,881 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 8574 transitions. Word has length 19 [2021-06-12 19:41:57,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:41:57,882 INFO L482 AbstractCegarLoop]: Abstraction has 2672 states and 8574 transitions. [2021-06-12 19:41:57,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:41:57,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 8574 transitions. [2021-06-12 19:41:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:41:57,884 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:41:57,884 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:41:58,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29452,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:41:58,084 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:41:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:41:58,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1303614395, now seen corresponding path program 230 times [2021-06-12 19:41:58,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:41:58,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919906471] [2021-06-12 19:41:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:41:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:41:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:41:58,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:41:58,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919906471] [2021-06-12 19:41:58,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919906471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:41:58,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816551076] [2021-06-12 19:41:58,180 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 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 [2021-06-12 19:41:58,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:41:58,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:41:58,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:41:58,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:41:58,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:58,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:41:58,998 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 201 [2021-06-12 19:41:59,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:41:59,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:41:59,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:42:00,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:00,532 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:42:00,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:42:00,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:42:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:00,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816551076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:00,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:00,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:42:00,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332691644] [2021-06-12 19:42:00,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:42:00,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:00,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:42:00,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:42:00,560 INFO L87 Difference]: Start difference. First operand 2672 states and 8574 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:42:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:01,703 INFO L93 Difference]: Finished difference Result 3059 states and 9551 transitions. [2021-06-12 19:42:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 19:42:01,703 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:42:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:01,706 INFO L225 Difference]: With dead ends: 3059 [2021-06-12 19:42:01,706 INFO L226 Difference]: Without dead ends: 3049 [2021-06-12 19:42:01,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 941.9ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 19:42:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-12 19:42:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2623. [2021-06-12 19:42:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 3.2070938215102975) internal successors, (8409), 2622 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 8409 transitions. [2021-06-12 19:42:01,735 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 8409 transitions. Word has length 19 [2021-06-12 19:42:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:01,735 INFO L482 AbstractCegarLoop]: Abstraction has 2623 states and 8409 transitions. [2021-06-12 19:42:01,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:42:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 8409 transitions. [2021-06-12 19:42:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:01,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:01,737 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:01,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29453,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:01,938 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2034173506, now seen corresponding path program 231 times [2021-06-12 19:42:01,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:01,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212900654] [2021-06-12 19:42:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:01,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212900654] [2021-06-12 19:42:01,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212900654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438666086] [2021-06-12 19:42:01,975 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 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 [2021-06-12 19:42:01,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:42:02,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:42:02,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:02,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438666086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:02,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:02,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:42:02,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138118052] [2021-06-12 19:42:02,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:42:02,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:42:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:42:02,034 INFO L87 Difference]: Start difference. First operand 2623 states and 8409 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:42:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:02,128 INFO L93 Difference]: Finished difference Result 2885 states and 8823 transitions. [2021-06-12 19:42:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:42:02,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 [2021-06-12 19:42:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:02,132 INFO L225 Difference]: With dead ends: 2885 [2021-06-12 19:42:02,132 INFO L226 Difference]: Without dead ends: 2885 [2021-06-12 19:42:02,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:42:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-06-12 19:42:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2399. [2021-06-12 19:42:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 2398 states have (on average 3.187656380316931) internal successors, (7644), 2398 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 7644 transitions. [2021-06-12 19:42:02,159 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 7644 transitions. Word has length 19 [2021-06-12 19:42:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:02,159 INFO L482 AbstractCegarLoop]: Abstraction has 2399 states and 7644 transitions. [2021-06-12 19:42:02,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:42:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 7644 transitions. [2021-06-12 19:42:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:02,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:02,161 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:02,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29771 [2021-06-12 19:42:02,362 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:02,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1085628289, now seen corresponding path program 232 times [2021-06-12 19:42:02,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:02,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898236467] [2021-06-12 19:42:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:02,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:02,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898236467] [2021-06-12 19:42:02,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898236467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:02,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218106667] [2021-06-12 19:42:02,455 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 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 [2021-06-12 19:42:02,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:42:02,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:02,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:42:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:02,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:02,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:42:03,952 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-06-12 19:42:04,162 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-06-12 19:42:04,427 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 613 DAG size of output: 505 [2021-06-12 19:42:04,894 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 569 [2021-06-12 19:42:05,889 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 294 [2021-06-12 19:42:06,442 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 383 [2021-06-12 19:42:06,907 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 295 [2021-06-12 19:42:07,323 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 506 [2021-06-12 19:42:07,965 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-06-12 19:42:08,621 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-06-12 19:42:09,318 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 624 [2021-06-12 19:42:09,644 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 473 [2021-06-12 19:42:10,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:42:10,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:10,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:42:10,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:10,679 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:42:10,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:42:10,679 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:42:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:10,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218106667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:10,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:10,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:42:10,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115521377] [2021-06-12 19:42:10,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:42:10,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:10,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:42:10,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:42:10,706 INFO L87 Difference]: Start difference. First operand 2399 states and 7644 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:42:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:11,814 INFO L93 Difference]: Finished difference Result 2756 states and 8561 transitions. [2021-06-12 19:42:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 19:42:11,814 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:42:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:11,817 INFO L225 Difference]: With dead ends: 2756 [2021-06-12 19:42:11,817 INFO L226 Difference]: Without dead ends: 2744 [2021-06-12 19:42:11,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 990.5ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 19:42:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-12 19:42:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2477. [2021-06-12 19:42:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.1902261712439417) internal successors, (7899), 2476 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7899 transitions. [2021-06-12 19:42:11,843 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7899 transitions. Word has length 19 [2021-06-12 19:42:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:11,843 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 7899 transitions. [2021-06-12 19:42:11,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:42:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7899 transitions. [2021-06-12 19:42:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:11,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:11,845 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:12,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29772,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:12,046 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:12,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1496317928, now seen corresponding path program 233 times [2021-06-12 19:42:12,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:12,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150942187] [2021-06-12 19:42:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:12,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:12,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150942187] [2021-06-12 19:42:12,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150942187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:12,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330714598] [2021-06-12 19:42:12,082 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 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 [2021-06-12 19:42:12,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:42:12,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:12,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:42:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:12,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330714598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:12,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:12,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:42:12,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286466678] [2021-06-12 19:42:12,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:42:12,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:12,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:42:12,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:42:12,148 INFO L87 Difference]: Start difference. First operand 2477 states and 7899 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:42:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:12,238 INFO L93 Difference]: Finished difference Result 3089 states and 9579 transitions. [2021-06-12 19:42:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:42:12,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 [2021-06-12 19:42:12,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:12,241 INFO L225 Difference]: With dead ends: 3089 [2021-06-12 19:42:12,242 INFO L226 Difference]: Without dead ends: 3089 [2021-06-12 19:42:12,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:42:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-06-12 19:42:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2881. [2021-06-12 19:42:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.1899305555555557) internal successors, (9187), 2880 states have internal predecessors, (9187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9187 transitions. [2021-06-12 19:42:12,273 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9187 transitions. Word has length 19 [2021-06-12 19:42:12,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:12,273 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 9187 transitions. [2021-06-12 19:42:12,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:42:12,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9187 transitions. [2021-06-12 19:42:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:12,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:12,275 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:12,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30406,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:12,476 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2137707461, now seen corresponding path program 234 times [2021-06-12 19:42:12,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:12,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341481237] [2021-06-12 19:42:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:42:12,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:12,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341481237] [2021-06-12 19:42:12,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341481237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:12,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120635955] [2021-06-12 19:42:12,585 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 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 [2021-06-12 19:42:12,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:42:12,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:12,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:42:12,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:12,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:12,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:42:13,628 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 210 [2021-06-12 19:42:13,761 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 244 [2021-06-12 19:42:14,689 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 226 [2021-06-12 19:42:14,836 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 239 [2021-06-12 19:42:15,770 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 745 DAG size of output: 381 [2021-06-12 19:42:16,036 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-06-12 19:42:16,315 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-06-12 19:42:16,605 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 387 [2021-06-12 19:42:16,832 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 282 [2021-06-12 19:42:17,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:42:17,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:17,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:42:17,744 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 274 [2021-06-12 19:42:17,936 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 245 [2021-06-12 19:42:18,055 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 254 [2021-06-12 19:42:19,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:19,285 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:42:19,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:42:19,286 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:42:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:19,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120635955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:19,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:19,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:42:19,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964161383] [2021-06-12 19:42:19,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:42:19,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:42:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:42:19,313 INFO L87 Difference]: Start difference. First operand 2881 states and 9187 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:42:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:20,295 INFO L93 Difference]: Finished difference Result 3023 states and 9474 transitions. [2021-06-12 19:42:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:42:20,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 19 [2021-06-12 19:42:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:20,298 INFO L225 Difference]: With dead ends: 3023 [2021-06-12 19:42:20,298 INFO L226 Difference]: Without dead ends: 3013 [2021-06-12 19:42:20,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 979.3ms TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 19:42:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-06-12 19:42:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2883. [2021-06-12 19:42:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2882 states have (on average 3.1887578070784177) internal successors, (9190), 2882 states have internal predecessors, (9190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 9190 transitions. [2021-06-12 19:42:20,329 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 9190 transitions. Word has length 19 [2021-06-12 19:42:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:20,329 INFO L482 AbstractCegarLoop]: Abstraction has 2883 states and 9190 transitions. [2021-06-12 19:42:20,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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) [2021-06-12 19:42:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 9190 transitions. [2021-06-12 19:42:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:20,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:20,331 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:20,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30407 [2021-06-12 19:42:20,532 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2002664194, now seen corresponding path program 235 times [2021-06-12 19:42:20,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:20,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878733485] [2021-06-12 19:42:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:42:20,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:20,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878733485] [2021-06-12 19:42:20,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878733485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:20,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133406842] [2021-06-12 19:42:20,706 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 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 [2021-06-12 19:42:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:20,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:42:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:42:20,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133406842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:20,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:20,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:42:20,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590735926] [2021-06-12 19:42:20,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:42:20,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:20,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:42:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:42:20,764 INFO L87 Difference]: Start difference. First operand 2883 states and 9190 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:42:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:20,831 INFO L93 Difference]: Finished difference Result 3131 states and 9825 transitions. [2021-06-12 19:42:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:42:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 [2021-06-12 19:42:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:20,834 INFO L225 Difference]: With dead ends: 3131 [2021-06-12 19:42:20,834 INFO L226 Difference]: Without dead ends: 3131 [2021-06-12 19:42:20,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:42:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-06-12 19:42:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3025. [2021-06-12 19:42:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.181878306878307) internal successors, (9622), 3024 states have internal predecessors, (9622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 9622 transitions. [2021-06-12 19:42:20,867 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 9622 transitions. Word has length 19 [2021-06-12 19:42:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:20,867 INFO L482 AbstractCegarLoop]: Abstraction has 3025 states and 9622 transitions. [2021-06-12 19:42:20,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:42:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 9622 transitions. [2021-06-12 19:42:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:20,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:20,869 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:21,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31140,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:21,070 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:21,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:21,070 INFO L82 PathProgramCache]: Analyzing trace with hash -392423425, now seen corresponding path program 236 times [2021-06-12 19:42:21,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:21,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322997051] [2021-06-12 19:42:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:21,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:21,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322997051] [2021-06-12 19:42:21,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322997051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:21,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496123815] [2021-06-12 19:42:21,192 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 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 [2021-06-12 19:42:21,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:42:21,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:21,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:42:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:21,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:21,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:42:22,866 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 201 [2021-06-12 19:42:23,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:42:23,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:23,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:42:23,590 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 202 [2021-06-12 19:42:24,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:24,358 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:42:24,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:42:24,359 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:42:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:24,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496123815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:24,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:24,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:42:24,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787513937] [2021-06-12 19:42:24,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:42:24,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:42:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:24,390 INFO L87 Difference]: Start difference. First operand 3025 states and 9622 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:42:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:25,388 INFO L93 Difference]: Finished difference Result 3173 states and 9925 transitions. [2021-06-12 19:42:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:42:25,388 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:42:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:25,391 INFO L225 Difference]: With dead ends: 3173 [2021-06-12 19:42:25,391 INFO L226 Difference]: Without dead ends: 3163 [2021-06-12 19:42:25,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1046.6ms TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:42:25,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-06-12 19:42:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3021. [2021-06-12 19:42:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3020 states have (on average 3.1841059602649007) internal successors, (9616), 3020 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 9616 transitions. [2021-06-12 19:42:25,424 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 9616 transitions. Word has length 19 [2021-06-12 19:42:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:25,424 INFO L482 AbstractCegarLoop]: Abstraction has 3021 states and 9616 transitions. [2021-06-12 19:42:25,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:42:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 9616 transitions. [2021-06-12 19:42:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:25,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:25,426 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:25,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31141 [2021-06-12 19:42:25,627 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:25,627 INFO L82 PathProgramCache]: Analyzing trace with hash -519529256, now seen corresponding path program 237 times [2021-06-12 19:42:25,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:25,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670458395] [2021-06-12 19:42:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:25,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:25,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670458395] [2021-06-12 19:42:25,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670458395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:25,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086992114] [2021-06-12 19:42:25,672 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 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 [2021-06-12 19:42:25,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:42:25,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:42:25,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:25,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086992114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:25,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:25,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:42:25,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404936004] [2021-06-12 19:42:25,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:42:25,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:42:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:42:25,729 INFO L87 Difference]: Start difference. First operand 3021 states and 9616 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:42:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:25,842 INFO L93 Difference]: Finished difference Result 3182 states and 9942 transitions. [2021-06-12 19:42:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:42:25,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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 19 [2021-06-12 19:42:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:25,845 INFO L225 Difference]: With dead ends: 3182 [2021-06-12 19:42:25,845 INFO L226 Difference]: Without dead ends: 3182 [2021-06-12 19:42:25,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:42:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-12 19:42:25,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3046. [2021-06-12 19:42:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-06-12 19:42:25,878 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-06-12 19:42:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:25,878 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-06-12 19:42:25,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:42:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-06-12 19:42:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:25,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:25,880 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:26,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31481,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:26,081 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2123193157, now seen corresponding path program 238 times [2021-06-12 19:42:26,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:26,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903413110] [2021-06-12 19:42:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:26,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:26,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903413110] [2021-06-12 19:42:26,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903413110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:26,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221662046] [2021-06-12 19:42:26,183 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 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 [2021-06-12 19:42:26,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:42:26,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:26,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:42:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:26,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:26,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:42:27,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:42:27,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:27,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:42:28,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:28,524 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:42:28,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:42:28,525 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:42:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:28,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221662046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:28,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:28,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:42:28,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858921339] [2021-06-12 19:42:28,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:42:28,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:28,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:42:28,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:28,552 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:42:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:29,388 INFO L93 Difference]: Finished difference Result 3126 states and 9832 transitions. [2021-06-12 19:42:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:42:29,388 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:42:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:29,391 INFO L225 Difference]: With dead ends: 3126 [2021-06-12 19:42:29,391 INFO L226 Difference]: Without dead ends: 3116 [2021-06-12 19:42:29,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 953.1ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:42:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-12 19:42:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3046. [2021-06-12 19:42:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-06-12 19:42:29,424 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-06-12 19:42:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:29,424 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-06-12 19:42:29,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:42:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-06-12 19:42:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:29,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:29,426 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:29,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31482,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:29,629 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1786986434, now seen corresponding path program 239 times [2021-06-12 19:42:29,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:29,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653291006] [2021-06-12 19:42:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:29,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:29,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653291006] [2021-06-12 19:42:29,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653291006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:29,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521351316] [2021-06-12 19:42:29,675 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 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 [2021-06-12 19:42:29,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:42:29,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:29,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:42:29,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:29,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521351316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:29,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:29,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:42:29,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159398669] [2021-06-12 19:42:29,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:42:29,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:42:29,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:42:29,732 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:42:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:29,878 INFO L93 Difference]: Finished difference Result 3257 states and 10135 transitions. [2021-06-12 19:42:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:42:29,878 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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 19 [2021-06-12 19:42:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:29,881 INFO L225 Difference]: With dead ends: 3257 [2021-06-12 19:42:29,881 INFO L226 Difference]: Without dead ends: 3257 [2021-06-12 19:42:29,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:42:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-06-12 19:42:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3085. [2021-06-12 19:42:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.180285343709468) internal successors, (9808), 3084 states have internal predecessors, (9808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 9808 transitions. [2021-06-12 19:42:29,914 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 9808 transitions. Word has length 19 [2021-06-12 19:42:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:29,914 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 9808 transitions. [2021-06-12 19:42:29,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:42:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 9808 transitions. [2021-06-12 19:42:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:29,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:29,916 INFO L472 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:30,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31804,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:30,117 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:30,117 INFO L82 PathProgramCache]: Analyzing trace with hash 57519999, now seen corresponding path program 240 times [2021-06-12 19:42:30,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:30,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104944981] [2021-06-12 19:42:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:30,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:30,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104944981] [2021-06-12 19:42:30,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104944981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:30,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571300863] [2021-06-12 19:42:30,221 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 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 [2021-06-12 19:42:30,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:42:30,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:30,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 19:42:30,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:30,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:30,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-12 19:42:31,095 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 203 [2021-06-12 19:42:31,834 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 224 [2021-06-12 19:42:32,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 19:42:32,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:32,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-12 19:42:32,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:32,754 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-12 19:42:32,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:42:32,755 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-12 19:42:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:32,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571300863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:32,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:32,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:42:32,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434525417] [2021-06-12 19:42:32,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:42:32,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:42:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:32,782 INFO L87 Difference]: Start difference. First operand 3085 states and 9808 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:42:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:33,651 INFO L93 Difference]: Finished difference Result 3146 states and 9913 transitions. [2021-06-12 19:42:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:42:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 19 [2021-06-12 19:42:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:33,654 INFO L225 Difference]: With dead ends: 3146 [2021-06-12 19:42:33,654 INFO L226 Difference]: Without dead ends: 3136 [2021-06-12 19:42:33,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1020.2ms TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:42:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-12 19:42:33,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 3087. [2021-06-12 19:42:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 3086 states have (on average 3.179196370706416) internal successors, (9811), 3086 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 9811 transitions. [2021-06-12 19:42:33,687 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 9811 transitions. Word has length 19 [2021-06-12 19:42:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:33,687 INFO L482 AbstractCegarLoop]: Abstraction has 3087 states and 9811 transitions. [2021-06-12 19:42:33,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-06-12 19:42:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 9811 transitions. [2021-06-12 19:42:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:42:33,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:33,689 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:33,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31805,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:33,890 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:33,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1871514008, now seen corresponding path program 241 times [2021-06-12 19:42:33,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:33,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893971013] [2021-06-12 19:42:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:33,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:33,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893971013] [2021-06-12 19:42:33,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893971013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:33,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977498806] [2021-06-12 19:42:33,939 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 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 [2021-06-12 19:42:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:42:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:33,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977498806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:33,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:33,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:42:33,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957518920] [2021-06-12 19:42:33,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:42:33,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:42:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:42:33,995 INFO L87 Difference]: Start difference. First operand 3087 states and 9811 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:42:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:34,160 INFO L93 Difference]: Finished difference Result 3398 states and 10507 transitions. [2021-06-12 19:42:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:42:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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 19 [2021-06-12 19:42:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:34,163 INFO L225 Difference]: With dead ends: 3398 [2021-06-12 19:42:34,164 INFO L226 Difference]: Without dead ends: 3398 [2021-06-12 19:42:34,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=256, Invalid=500, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:42:34,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-06-12 19:42:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 3101. [2021-06-12 19:42:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.1783870967741934) internal successors, (9853), 3100 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9853 transitions. [2021-06-12 19:42:34,196 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9853 transitions. Word has length 19 [2021-06-12 19:42:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:34,196 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 9853 transitions. [2021-06-12 19:42:34,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) 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) [2021-06-12 19:42:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9853 transitions. [2021-06-12 19:42:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:34,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:34,198 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:34,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32229,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:34,398 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:34,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:34,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1968008967, now seen corresponding path program 242 times [2021-06-12 19:42:34,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:34,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129263584] [2021-06-12 19:42:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:34,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129263584] [2021-06-12 19:42:34,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129263584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857588064] [2021-06-12 19:42:34,498 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 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 [2021-06-12 19:42:34,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:42:34,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:34,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:42:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:34,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:34,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:42:36,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:36,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:36,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:42:36,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:42:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:36,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857588064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:36,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:36,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:42:36,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623412303] [2021-06-12 19:42:36,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:42:36,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:42:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:42:36,227 INFO L87 Difference]: Start difference. First operand 3101 states and 9853 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:36,595 INFO L93 Difference]: Finished difference Result 3193 states and 10066 transitions. [2021-06-12 19:42:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:42:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:42:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:36,599 INFO L225 Difference]: With dead ends: 3193 [2021-06-12 19:42:36,599 INFO L226 Difference]: Without dead ends: 3182 [2021-06-12 19:42:36,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:42:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-12 19:42:36,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3124. [2021-06-12 19:42:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-06-12 19:42:36,632 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-06-12 19:42:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:36,632 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-06-12 19:42:36,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-06-12 19:42:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:36,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:36,634 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:36,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32230,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:36,835 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:36,835 INFO L82 PathProgramCache]: Analyzing trace with hash -750369269, now seen corresponding path program 243 times [2021-06-12 19:42:36,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:36,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799779158] [2021-06-12 19:42:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:36,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:36,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799779158] [2021-06-12 19:42:36,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799779158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:36,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334824477] [2021-06-12 19:42:36,924 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 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 [2021-06-12 19:42:36,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:42:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:42:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:37,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:37,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:42:38,687 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 238 [2021-06-12 19:42:38,888 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-06-12 19:42:39,107 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-06-12 19:42:39,329 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 331 [2021-06-12 19:42:39,652 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 404 [2021-06-12 19:42:40,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:40,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:40,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:42:40,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:42:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:40,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334824477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:40,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:40,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:42:40,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004944336] [2021-06-12 19:42:40,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:42:40,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:42:40,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:42:40,243 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:40,674 INFO L93 Difference]: Finished difference Result 3211 states and 10096 transitions. [2021-06-12 19:42:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:42:40,674 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:42:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:40,678 INFO L225 Difference]: With dead ends: 3211 [2021-06-12 19:42:40,678 INFO L226 Difference]: Without dead ends: 3206 [2021-06-12 19:42:40,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:42:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-06-12 19:42:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3124. [2021-06-12 19:42:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-06-12 19:42:40,711 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-06-12 19:42:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:40,711 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-06-12 19:42:40,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-06-12 19:42:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:40,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:40,713 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:40,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32498 [2021-06-12 19:42:40,916 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:40,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1411633052, now seen corresponding path program 244 times [2021-06-12 19:42:40,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:40,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671866590] [2021-06-12 19:42:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:40,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:40,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671866590] [2021-06-12 19:42:40,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671866590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:40,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54812808] [2021-06-12 19:42:40,958 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 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 [2021-06-12 19:42:40,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:42:40,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:40,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:42:40,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:41,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54812808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:41,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:41,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:42:41,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632586834] [2021-06-12 19:42:41,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:42:41,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:41,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:42:41,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:42:41,019 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:42:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:41,082 INFO L93 Difference]: Finished difference Result 3606 states and 10977 transitions. [2021-06-12 19:42:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:42:41,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-12 19:42:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:41,087 INFO L225 Difference]: With dead ends: 3606 [2021-06-12 19:42:41,087 INFO L226 Difference]: Without dead ends: 3606 [2021-06-12 19:42:41,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:42:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-06-12 19:42:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3155. [2021-06-12 19:42:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 3.182625237793278) internal successors, (10038), 3154 states have internal predecessors, (10038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 10038 transitions. [2021-06-12 19:42:41,125 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 10038 transitions. Word has length 20 [2021-06-12 19:42:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:41,125 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 10038 transitions. [2021-06-12 19:42:41,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:42:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 10038 transitions. [2021-06-12 19:42:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:41,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:41,127 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:41,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32792 [2021-06-12 19:42:41,328 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1981379847, now seen corresponding path program 245 times [2021-06-12 19:42:41,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:41,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754749691] [2021-06-12 19:42:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:41,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:41,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754749691] [2021-06-12 19:42:41,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754749691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:41,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417418969] [2021-06-12 19:42:41,419 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 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 [2021-06-12 19:42:41,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:42:41,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:42:41,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:41,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:41,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:42:42,277 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 271 [2021-06-12 19:42:42,499 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 282 [2021-06-12 19:42:42,728 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 280 [2021-06-12 19:42:42,878 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 276 [2021-06-12 19:42:43,238 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 352 [2021-06-12 19:42:44,266 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 241 [2021-06-12 19:42:44,414 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 315 [2021-06-12 19:42:44,586 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 356 [2021-06-12 19:42:44,763 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 367 [2021-06-12 19:42:45,008 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-06-12 19:42:45,236 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-06-12 19:42:45,503 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 391 [2021-06-12 19:42:45,668 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 330 [2021-06-12 19:42:46,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:46,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:46,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:42:46,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:42:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:46,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417418969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:46,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:46,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:42:46,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390888647] [2021-06-12 19:42:46,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:42:46,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:46,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:42:46,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:42:46,018 INFO L87 Difference]: Start difference. First operand 3155 states and 10038 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:46,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:46,358 INFO L93 Difference]: Finished difference Result 3260 states and 10216 transitions. [2021-06-12 19:42:46,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:42:46,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:42:46,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:46,362 INFO L225 Difference]: With dead ends: 3260 [2021-06-12 19:42:46,362 INFO L226 Difference]: Without dead ends: 3251 [2021-06-12 19:42:46,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:42:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-12 19:42:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 3158. [2021-06-12 19:42:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-06-12 19:42:46,397 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-06-12 19:42:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:46,397 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-06-12 19:42:46,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-06-12 19:42:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:46,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:46,399 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:46,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32793,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:46,600 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:46,600 INFO L82 PathProgramCache]: Analyzing trace with hash 853983754, now seen corresponding path program 246 times [2021-06-12 19:42:46,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:46,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750855566] [2021-06-12 19:42:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:46,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:46,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750855566] [2021-06-12 19:42:46,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750855566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:46,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732976862] [2021-06-12 19:42:46,643 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 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 [2021-06-12 19:42:46,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:42:46,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:42:46,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:46,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732976862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:46,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:46,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:42:46,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789893269] [2021-06-12 19:42:46,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:42:46,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:46,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:42:46,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:42:46,723 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:42:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:46,802 INFO L93 Difference]: Finished difference Result 3782 states and 11476 transitions. [2021-06-12 19:42:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:42:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-12 19:42:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:46,807 INFO L225 Difference]: With dead ends: 3782 [2021-06-12 19:42:46,807 INFO L226 Difference]: Without dead ends: 3782 [2021-06-12 19:42:46,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:42:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-06-12 19:42:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 3158. [2021-06-12 19:42:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-06-12 19:42:46,849 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-06-12 19:42:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:46,849 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-06-12 19:42:46,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:42:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-06-12 19:42:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:46,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:46,851 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:47,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33222 [2021-06-12 19:42:47,052 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1336798777, now seen corresponding path program 247 times [2021-06-12 19:42:47,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:47,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863547755] [2021-06-12 19:42:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:47,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863547755] [2021-06-12 19:42:47,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863547755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457840416] [2021-06-12 19:42:47,146 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 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 [2021-06-12 19:42:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:42:47,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:47,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:47,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:42:48,379 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-06-12 19:42:48,539 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-06-12 19:42:48,748 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 370 [2021-06-12 19:42:48,987 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 413 [2021-06-12 19:42:49,664 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 372 [2021-06-12 19:42:50,053 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 245 [2021-06-12 19:42:50,402 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 325 [2021-06-12 19:42:50,590 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 402 [2021-06-12 19:42:50,918 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-06-12 19:42:51,227 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-06-12 19:42:51,651 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 644 DAG size of output: 521 [2021-06-12 19:42:52,070 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 412 [2021-06-12 19:42:52,234 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 350 [2021-06-12 19:42:52,355 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 268 [2021-06-12 19:42:52,901 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 223 [2021-06-12 19:42:53,005 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 223 [2021-06-12 19:42:53,125 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 229 [2021-06-12 19:42:53,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:53,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:53,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:42:53,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:42:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:53,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457840416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:53,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:53,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:42:53,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323300449] [2021-06-12 19:42:53,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:42:53,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:53,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:42:53,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:42:53,500 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:53,807 INFO L93 Difference]: Finished difference Result 3264 states and 10240 transitions. [2021-06-12 19:42:53,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:42:53,807 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:42:53,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:53,811 INFO L225 Difference]: With dead ends: 3264 [2021-06-12 19:42:53,811 INFO L226 Difference]: Without dead ends: 3257 [2021-06-12 19:42:53,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:42:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-06-12 19:42:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3161. [2021-06-12 19:42:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 3.1825949367088606) internal successors, (10057), 3160 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 10057 transitions. [2021-06-12 19:42:53,844 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 10057 transitions. Word has length 20 [2021-06-12 19:42:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:53,844 INFO L482 AbstractCegarLoop]: Abstraction has 3161 states and 10057 transitions. [2021-06-12 19:42:53,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 10057 transitions. [2021-06-12 19:42:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:53,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:53,846 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:54,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33223,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:42:54,047 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:54,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1830772426, now seen corresponding path program 248 times [2021-06-12 19:42:54,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:54,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183024943] [2021-06-12 19:42:54,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:54,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:54,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183024943] [2021-06-12 19:42:54,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183024943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:54,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137131136] [2021-06-12 19:42:54,098 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 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 [2021-06-12 19:42:54,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:42:54,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:42:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:54,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137131136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:54,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:54,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:42:54,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643832586] [2021-06-12 19:42:54,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:42:54,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:54,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:42:54,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:42:54,155 INFO L87 Difference]: Start difference. First operand 3161 states and 10057 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:42:54,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:54,227 INFO L93 Difference]: Finished difference Result 3795 states and 11521 transitions. [2021-06-12 19:42:54,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:42:54,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-12 19:42:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:54,231 INFO L225 Difference]: With dead ends: 3795 [2021-06-12 19:42:54,231 INFO L226 Difference]: Without dead ends: 3795 [2021-06-12 19:42:54,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:42:54,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-12 19:42:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3140. [2021-06-12 19:42:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.1815864925135395) internal successors, (9987), 3139 states have internal predecessors, (9987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 9987 transitions. [2021-06-12 19:42:54,267 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 9987 transitions. Word has length 20 [2021-06-12 19:42:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:54,267 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 9987 transitions. [2021-06-12 19:42:54,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:42:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 9987 transitions. [2021-06-12 19:42:54,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:54,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:54,269 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:54,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33619 [2021-06-12 19:42:54,471 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1926339292, now seen corresponding path program 249 times [2021-06-12 19:42:54,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:54,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201005164] [2021-06-12 19:42:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:54,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:54,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201005164] [2021-06-12 19:42:54,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201005164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:54,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448831259] [2021-06-12 19:42:54,516 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 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 [2021-06-12 19:42:54,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:42:54,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:54,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:42:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:54,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448831259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:54,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:54,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:42:54,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885786919] [2021-06-12 19:42:54,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:42:54,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:54,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:42:54,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:42:54,576 INFO L87 Difference]: Start difference. First operand 3140 states and 9987 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:42:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:54,685 INFO L93 Difference]: Finished difference Result 4051 states and 12203 transitions. [2021-06-12 19:42:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:42:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:42:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:54,689 INFO L225 Difference]: With dead ends: 4051 [2021-06-12 19:42:54,689 INFO L226 Difference]: Without dead ends: 4051 [2021-06-12 19:42:54,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:42:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-12 19:42:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3009. [2021-06-12 19:42:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 3.171542553191489) internal successors, (9540), 3008 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 9540 transitions. [2021-06-12 19:42:54,723 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 9540 transitions. Word has length 20 [2021-06-12 19:42:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:54,723 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 9540 transitions. [2021-06-12 19:42:54,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:42:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 9540 transitions. [2021-06-12 19:42:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:54,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:54,725 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:54,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33620 [2021-06-12 19:42:54,927 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:54,927 INFO L82 PathProgramCache]: Analyzing trace with hash -393864147, now seen corresponding path program 250 times [2021-06-12 19:42:54,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:54,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034547280] [2021-06-12 19:42:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:42:55,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:55,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034547280] [2021-06-12 19:42:55,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034547280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:55,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335971524] [2021-06-12 19:42:55,001 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 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 [2021-06-12 19:42:55,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:42:55,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:55,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:42:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:55,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:55,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:42:56,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:56,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:56,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:42:56,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:42:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:56,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335971524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:56,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:56,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:42:56,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748939760] [2021-06-12 19:42:56,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:42:56,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:42:56,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:42:56,268 INFO L87 Difference]: Start difference. First operand 3009 states and 9540 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:42:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:42:56,768 INFO L93 Difference]: Finished difference Result 3118 states and 9737 transitions. [2021-06-12 19:42:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:42:56,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 [2021-06-12 19:42:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:42:56,772 INFO L225 Difference]: With dead ends: 3118 [2021-06-12 19:42:56,772 INFO L226 Difference]: Without dead ends: 3095 [2021-06-12 19:42:56,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:42:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-06-12 19:42:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 3011. [2021-06-12 19:42:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:42:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-06-12 19:42:56,804 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-06-12 19:42:56,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:42:56,804 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-06-12 19:42:56,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:42:56,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-06-12 19:42:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:42:56,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:42:56,807 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:42:57,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33621 [2021-06-12 19:42:57,007 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:42:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:42:57,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1511860465, now seen corresponding path program 251 times [2021-06-12 19:42:57,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:42:57,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501057800] [2021-06-12 19:42:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:42:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:42:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:42:57,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:42:57,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501057800] [2021-06-12 19:42:57,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501057800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:57,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155198294] [2021-06-12 19:42:57,080 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 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 [2021-06-12 19:42:57,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:42:57,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:42:57,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 19:42:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:42:57,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:57,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:42:58,606 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-06-12 19:42:58,735 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-06-12 19:42:58,881 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 258 [2021-06-12 19:42:59,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:42:59,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:42:59,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:42:59,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:42:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:42:59,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155198294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:42:59,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:42:59,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:42:59,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116982009] [2021-06-12 19:42:59,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:42:59,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:42:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:42:59,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:42:59,769 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:43:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:00,051 INFO L93 Difference]: Finished difference Result 3095 states and 9704 transitions. [2021-06-12 19:43:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:43:00,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 [2021-06-12 19:43:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:00,055 INFO L225 Difference]: With dead ends: 3095 [2021-06-12 19:43:00,055 INFO L226 Difference]: Without dead ends: 3090 [2021-06-12 19:43:00,055 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2021-06-12 19:43:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 3011. [2021-06-12 19:43:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-06-12 19:43:00,087 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-06-12 19:43:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:00,087 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-06-12 19:43:00,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:43:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-06-12 19:43:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:00,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:00,089 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:00,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33775 [2021-06-12 19:43:00,290 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:00,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1121121017, now seen corresponding path program 252 times [2021-06-12 19:43:00,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:00,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088375922] [2021-06-12 19:43:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:00,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:00,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088375922] [2021-06-12 19:43:00,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088375922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:00,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423104541] [2021-06-12 19:43:00,396 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 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 [2021-06-12 19:43:00,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:43:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:00,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:00,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:00,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:01,272 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 266 [2021-06-12 19:43:01,411 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-12 19:43:01,533 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-12 19:43:01,681 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 288 [2021-06-12 19:43:02,028 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 369 [2021-06-12 19:43:02,391 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 332 [2021-06-12 19:43:02,510 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 269 [2021-06-12 19:43:03,178 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 243 [2021-06-12 19:43:03,346 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 310 [2021-06-12 19:43:03,528 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 329 [2021-06-12 19:43:04,424 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 332 [2021-06-12 19:43:04,727 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 469 [2021-06-12 19:43:05,224 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-06-12 19:43:05,705 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-06-12 19:43:06,258 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 1053 DAG size of output: 561 [2021-06-12 19:43:06,445 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 305 [2021-06-12 19:43:06,801 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 341 [2021-06-12 19:43:06,928 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 250 [2021-06-12 19:43:07,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:07,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:07,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:07,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:07,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423104541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:07,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:07,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:43:07,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027442366] [2021-06-12 19:43:07,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:43:07,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:43:07,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:43:07,606 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:07,943 INFO L93 Difference]: Finished difference Result 3110 states and 9713 transitions. [2021-06-12 19:43:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:43:07,944 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:43:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:07,947 INFO L225 Difference]: With dead ends: 3110 [2021-06-12 19:43:07,947 INFO L226 Difference]: Without dead ends: 3101 [2021-06-12 19:43:07,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-12 19:43:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 3010. [2021-06-12 19:43:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.1665004985044867) internal successors, (9528), 3009 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 9528 transitions. [2021-06-12 19:43:07,980 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 9528 transitions. Word has length 20 [2021-06-12 19:43:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:07,980 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 9528 transitions. [2021-06-12 19:43:07,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 9528 transitions. [2021-06-12 19:43:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:07,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:07,982 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:08,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34134 [2021-06-12 19:43:08,183 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash -187657308, now seen corresponding path program 253 times [2021-06-12 19:43:08,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:08,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678064532] [2021-06-12 19:43:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:08,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678064532] [2021-06-12 19:43:08,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678064532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386051848] [2021-06-12 19:43:08,221 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 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 [2021-06-12 19:43:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:08,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:43:08,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386051848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:08,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:08,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:43:08,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447392992] [2021-06-12 19:43:08,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:43:08,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:08,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:43:08,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:43:08,275 INFO L87 Difference]: Start difference. First operand 3010 states and 9528 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:43:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:08,329 INFO L93 Difference]: Finished difference Result 3282 states and 10018 transitions. [2021-06-12 19:43:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:43:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 20 [2021-06-12 19:43:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:08,332 INFO L225 Difference]: With dead ends: 3282 [2021-06-12 19:43:08,332 INFO L226 Difference]: Without dead ends: 3282 [2021-06-12 19:43:08,332 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:43:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-06-12 19:43:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3032. [2021-06-12 19:43:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.167601451666117) internal successors, (9601), 3031 states have internal predecessors, (9601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 9601 transitions. [2021-06-12 19:43:08,385 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 9601 transitions. Word has length 20 [2021-06-12 19:43:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:08,385 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 9601 transitions. [2021-06-12 19:43:08,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:43:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 9601 transitions. [2021-06-12 19:43:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:08,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:08,387 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:08,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34552,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:08,587 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:08,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2046450186, now seen corresponding path program 254 times [2021-06-12 19:43:08,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:08,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637693253] [2021-06-12 19:43:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:08,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:08,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637693253] [2021-06-12 19:43:08,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637693253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:08,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377619799] [2021-06-12 19:43:08,627 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 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 [2021-06-12 19:43:08,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:08,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:08,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:08,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377619799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:08,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:08,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:43:08,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615238589] [2021-06-12 19:43:08,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:43:08,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:08,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:43:08,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:43:08,681 INFO L87 Difference]: Start difference. First operand 3032 states and 9601 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:43:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:08,752 INFO L93 Difference]: Finished difference Result 3444 states and 10441 transitions. [2021-06-12 19:43:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:43:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-12 19:43:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:08,756 INFO L225 Difference]: With dead ends: 3444 [2021-06-12 19:43:08,756 INFO L226 Difference]: Without dead ends: 3444 [2021-06-12 19:43:08,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2021-06-12 19:43:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3015. [2021-06-12 19:43:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.1648971466489715) internal successors, (9539), 3014 states have internal predecessors, (9539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 9539 transitions. [2021-06-12 19:43:08,790 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 9539 transitions. Word has length 20 [2021-06-12 19:43:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:08,790 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 9539 transitions. [2021-06-12 19:43:08,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:43:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 9539 transitions. [2021-06-12 19:43:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:08,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:08,792 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:08,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34553 [2021-06-12 19:43:08,993 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:08,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1710661532, now seen corresponding path program 255 times [2021-06-12 19:43:08,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:08,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230407970] [2021-06-12 19:43:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:09,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:09,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230407970] [2021-06-12 19:43:09,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230407970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:09,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209656611] [2021-06-12 19:43:09,033 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 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 [2021-06-12 19:43:09,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:43:09,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:09,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:09,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:09,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209656611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:09,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:09,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:43:09,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615821314] [2021-06-12 19:43:09,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:09,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:09,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:09,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:09,101 INFO L87 Difference]: Start difference. First operand 3015 states and 9539 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:09,206 INFO L93 Difference]: Finished difference Result 3807 states and 11446 transitions. [2021-06-12 19:43:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:43:09,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:43:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:09,210 INFO L225 Difference]: With dead ends: 3807 [2021-06-12 19:43:09,210 INFO L226 Difference]: Without dead ends: 3807 [2021-06-12 19:43:09,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:43:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-12 19:43:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2940. [2021-06-12 19:43:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.159918339571283) internal successors, (9287), 2939 states have internal predecessors, (9287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9287 transitions. [2021-06-12 19:43:09,243 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9287 transitions. Word has length 20 [2021-06-12 19:43:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:09,243 INFO L482 AbstractCegarLoop]: Abstraction has 2940 states and 9287 transitions. [2021-06-12 19:43:09,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9287 transitions. [2021-06-12 19:43:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:09,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:09,245 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:09,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34554 [2021-06-12 19:43:09,446 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2077959498, now seen corresponding path program 256 times [2021-06-12 19:43:09,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:09,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895320223] [2021-06-12 19:43:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:09,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:09,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895320223] [2021-06-12 19:43:09,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895320223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:09,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580150927] [2021-06-12 19:43:09,489 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 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 [2021-06-12 19:43:09,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:09,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:09,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:09,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:09,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580150927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:09,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:09,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:43:09,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671267550] [2021-06-12 19:43:09,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:09,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:09,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:09,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:09,548 INFO L87 Difference]: Start difference. First operand 2940 states and 9287 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:09,684 INFO L93 Difference]: Finished difference Result 4596 states and 14016 transitions. [2021-06-12 19:43:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:43:09,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:43:09,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:09,689 INFO L225 Difference]: With dead ends: 4596 [2021-06-12 19:43:09,689 INFO L226 Difference]: Without dead ends: 4596 [2021-06-12 19:43:09,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:43:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-06-12 19:43:09,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3707. [2021-06-12 19:43:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 3706 states have (on average 3.1813275769023206) internal successors, (11790), 3706 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 11790 transitions. [2021-06-12 19:43:09,735 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 11790 transitions. Word has length 20 [2021-06-12 19:43:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:09,735 INFO L482 AbstractCegarLoop]: Abstraction has 3707 states and 11790 transitions. [2021-06-12 19:43:09,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 11790 transitions. [2021-06-12 19:43:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:09,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:09,738 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:09,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34555,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:09,938 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:09,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:09,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2063705743, now seen corresponding path program 257 times [2021-06-12 19:43:09,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:09,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009846672] [2021-06-12 19:43:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:43:10,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:10,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009846672] [2021-06-12 19:43:10,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009846672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:10,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400105289] [2021-06-12 19:43:10,000 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 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 [2021-06-12 19:43:10,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:43:10,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:10,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:10,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:10,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:10,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:10,802 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 275 [2021-06-12 19:43:11,010 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 286 [2021-06-12 19:43:11,175 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 284 [2021-06-12 19:43:11,411 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 305 [2021-06-12 19:43:11,550 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 212 [2021-06-12 19:43:11,667 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 278 [2021-06-12 19:43:12,151 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 268 [2021-06-12 19:43:12,287 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 191 [2021-06-12 19:43:12,890 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 256 [2021-06-12 19:43:13,106 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-06-12 19:43:13,338 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-06-12 19:43:13,575 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 272 [2021-06-12 19:43:13,752 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 316 [2021-06-12 19:43:14,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:14,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:14,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:14,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:14,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400105289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:14,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:14,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-12 19:43:14,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695669422] [2021-06-12 19:43:14,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:43:14,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:14,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:43:14,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:43:14,690 INFO L87 Difference]: Start difference. First operand 3707 states and 11790 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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) [2021-06-12 19:43:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:14,933 INFO L93 Difference]: Finished difference Result 3745 states and 11853 transitions. [2021-06-12 19:43:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:43:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 [2021-06-12 19:43:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:14,937 INFO L225 Difference]: With dead ends: 3745 [2021-06-12 19:43:14,937 INFO L226 Difference]: Without dead ends: 3721 [2021-06-12 19:43:14,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:43:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-06-12 19:43:14,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3708. [2021-06-12 19:43:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 3.1810089020771515) internal successors, (11792), 3707 states have internal predecessors, (11792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 11792 transitions. [2021-06-12 19:43:14,976 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 11792 transitions. Word has length 20 [2021-06-12 19:43:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:14,976 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 11792 transitions. [2021-06-12 19:43:14,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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) [2021-06-12 19:43:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 11792 transitions. [2021-06-12 19:43:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:14,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:14,978 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:15,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34556 [2021-06-12 19:43:15,179 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:15,179 INFO L82 PathProgramCache]: Analyzing trace with hash 875393611, now seen corresponding path program 258 times [2021-06-12 19:43:15,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:15,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542932148] [2021-06-12 19:43:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:15,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:15,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542932148] [2021-06-12 19:43:15,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542932148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:15,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950215669] [2021-06-12 19:43:15,250 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 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 [2021-06-12 19:43:15,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:43:15,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:15,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:15,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:15,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:15,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:16,034 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 267 [2021-06-12 19:43:16,465 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 329 [2021-06-12 19:43:16,574 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 262 [2021-06-12 19:43:16,822 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 293 [2021-06-12 19:43:17,646 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 237 [2021-06-12 19:43:17,792 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 281 [2021-06-12 19:43:18,050 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 416 [2021-06-12 19:43:18,315 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-06-12 19:43:18,594 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-06-12 19:43:18,890 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 476 [2021-06-12 19:43:19,239 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 525 [2021-06-12 19:43:19,832 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 477 [2021-06-12 19:43:20,441 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-06-12 19:43:20,589 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-06-12 19:43:20,712 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 283 [2021-06-12 19:43:21,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:21,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:21,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:21,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:21,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950215669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:21,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:21,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:43:21,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879013967] [2021-06-12 19:43:21,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:43:21,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:43:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:43:21,011 INFO L87 Difference]: Start difference. First operand 3708 states and 11792 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:43:21,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:21,448 INFO L93 Difference]: Finished difference Result 3819 states and 12002 transitions. [2021-06-12 19:43:21,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:43:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 [2021-06-12 19:43:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:21,453 INFO L225 Difference]: With dead ends: 3819 [2021-06-12 19:43:21,453 INFO L226 Difference]: Without dead ends: 3798 [2021-06-12 19:43:21,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:43:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-12 19:43:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3706. [2021-06-12 19:43:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 3705 states have (on average 3.1813765182186233) internal successors, (11787), 3705 states have internal predecessors, (11787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 11787 transitions. [2021-06-12 19:43:21,496 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 11787 transitions. Word has length 20 [2021-06-12 19:43:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:21,497 INFO L482 AbstractCegarLoop]: Abstraction has 3706 states and 11787 transitions. [2021-06-12 19:43:21,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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) [2021-06-12 19:43:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 11787 transitions. [2021-06-12 19:43:21,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:21,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:21,499 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:21,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34845 [2021-06-12 19:43:21,699 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash 452803937, now seen corresponding path program 259 times [2021-06-12 19:43:21,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:21,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605408844] [2021-06-12 19:43:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:21,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:21,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605408844] [2021-06-12 19:43:21,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605408844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:21,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049420145] [2021-06-12 19:43:21,769 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 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 [2021-06-12 19:43:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:22,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:22,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:22,847 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 227 [2021-06-12 19:43:23,023 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 218 [2021-06-12 19:43:23,942 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 253 [2021-06-12 19:43:24,659 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 211 [2021-06-12 19:43:24,830 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 261 [2021-06-12 19:43:25,014 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-06-12 19:43:25,200 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-06-12 19:43:25,404 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 272 [2021-06-12 19:43:25,548 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 255 [2021-06-12 19:43:25,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:25,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:25,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:25,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:25,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049420145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:25,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:25,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:43:25,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574199622] [2021-06-12 19:43:25,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:43:25,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:25,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:43:25,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:43:25,799 INFO L87 Difference]: Start difference. First operand 3706 states and 11787 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:26,229 INFO L93 Difference]: Finished difference Result 3787 states and 11914 transitions. [2021-06-12 19:43:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:43:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:43:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:26,233 INFO L225 Difference]: With dead ends: 3787 [2021-06-12 19:43:26,233 INFO L226 Difference]: Without dead ends: 3758 [2021-06-12 19:43:26,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:43:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2021-06-12 19:43:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3704. [2021-06-12 19:43:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.179044018363489) internal successors, (11772), 3703 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11772 transitions. [2021-06-12 19:43:26,279 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11772 transitions. Word has length 20 [2021-06-12 19:43:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:26,280 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11772 transitions. [2021-06-12 19:43:26,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11772 transitions. [2021-06-12 19:43:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:26,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:26,282 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:26,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35236 [2021-06-12 19:43:26,483 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:26,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1936438747, now seen corresponding path program 260 times [2021-06-12 19:43:26,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:26,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843790855] [2021-06-12 19:43:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:26,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843790855] [2021-06-12 19:43:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843790855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785825780] [2021-06-12 19:43:26,564 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 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 [2021-06-12 19:43:26,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:26,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:26,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:26,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:26,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:27,636 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 354 [2021-06-12 19:43:28,291 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 403 [2021-06-12 19:43:29,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:29,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:29,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:29,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:29,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785825780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:29,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:29,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:43:29,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515403882] [2021-06-12 19:43:29,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:43:29,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:43:29,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:43:29,521 INFO L87 Difference]: Start difference. First operand 3704 states and 11772 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:29,942 INFO L93 Difference]: Finished difference Result 3820 states and 11980 transitions. [2021-06-12 19:43:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:43:29,942 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:43:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:29,946 INFO L225 Difference]: With dead ends: 3820 [2021-06-12 19:43:29,946 INFO L226 Difference]: Without dead ends: 3801 [2021-06-12 19:43:29,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:43:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-12 19:43:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3704. [2021-06-12 19:43:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-06-12 19:43:29,996 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-06-12 19:43:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:29,996 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-06-12 19:43:29,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-06-12 19:43:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:29,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:29,999 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:30,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35601 [2021-06-12 19:43:30,215 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:30,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1306449377, now seen corresponding path program 261 times [2021-06-12 19:43:30,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:30,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614862198] [2021-06-12 19:43:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:30,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:30,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614862198] [2021-06-12 19:43:30,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614862198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:30,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658045020] [2021-06-12 19:43:30,343 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 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 [2021-06-12 19:43:30,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:43:30,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:30,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:30,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:30,741 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 19:43:30,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:30,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:31,494 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 315 [2021-06-12 19:43:31,600 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 254 [2021-06-12 19:43:32,365 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 281 [2021-06-12 19:43:32,489 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 274 [2021-06-12 19:43:33,444 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 252 [2021-06-12 19:43:33,659 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 332 [2021-06-12 19:43:33,988 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-06-12 19:43:34,335 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-06-12 19:43:34,707 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 449 [2021-06-12 19:43:35,210 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 432 [2021-06-12 19:43:35,434 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 229 [2021-06-12 19:43:36,434 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 288 [2021-06-12 19:43:36,559 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-06-12 19:43:36,688 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-06-12 19:43:36,838 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 299 [2021-06-12 19:43:36,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:36,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:36,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:36,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:36,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658045020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:36,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:36,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:43:36,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544598416] [2021-06-12 19:43:36,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:43:36,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:43:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:43:36,981 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:37,303 INFO L93 Difference]: Finished difference Result 3872 states and 12169 transitions. [2021-06-12 19:43:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:43:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:43:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:37,308 INFO L225 Difference]: With dead ends: 3872 [2021-06-12 19:43:37,308 INFO L226 Difference]: Without dead ends: 3867 [2021-06-12 19:43:37,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:43:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-06-12 19:43:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3704. [2021-06-12 19:43:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-06-12 19:43:37,351 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-06-12 19:43:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:37,351 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-06-12 19:43:37,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-06-12 19:43:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:37,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:37,354 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:37,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35895,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:37,554 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:37,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1269922247, now seen corresponding path program 262 times [2021-06-12 19:43:37,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:37,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076792451] [2021-06-12 19:43:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:37,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076792451] [2021-06-12 19:43:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076792451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997719959] [2021-06-12 19:43:37,644 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 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 [2021-06-12 19:43:37,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:37,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:37,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:37,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:37,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:37,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:39,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:39,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:39,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:39,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:39,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997719959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:39,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:39,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:43:39,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971851573] [2021-06-12 19:43:39,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:43:39,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:39,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:43:39,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:43:39,820 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:40,217 INFO L93 Difference]: Finished difference Result 3769 states and 11875 transitions. [2021-06-12 19:43:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:43:40,217 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:43:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:40,221 INFO L225 Difference]: With dead ends: 3769 [2021-06-12 19:43:40,221 INFO L226 Difference]: Without dead ends: 3760 [2021-06-12 19:43:40,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2021-06-12 19:43:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3700. [2021-06-12 19:43:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 3.176263855095972) internal successors, (11749), 3699 states have internal predecessors, (11749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 11749 transitions. [2021-06-12 19:43:40,266 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 11749 transitions. Word has length 20 [2021-06-12 19:43:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:40,266 INFO L482 AbstractCegarLoop]: Abstraction has 3700 states and 11749 transitions. [2021-06-12 19:43:40,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 11749 transitions. [2021-06-12 19:43:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:40,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:40,268 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:40,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36523 [2021-06-12 19:43:40,469 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash 142526154, now seen corresponding path program 263 times [2021-06-12 19:43:40,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:40,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232899709] [2021-06-12 19:43:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:40,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:40,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232899709] [2021-06-12 19:43:40,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232899709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:40,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570655668] [2021-06-12 19:43:40,507 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 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 [2021-06-12 19:43:40,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:43:40,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:40,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:40,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:40,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570655668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:40,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:40,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:43:40,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456594905] [2021-06-12 19:43:40,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:43:40,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:43:40,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:43:40,560 INFO L87 Difference]: Start difference. First operand 3700 states and 11749 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:43:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:40,618 INFO L93 Difference]: Finished difference Result 3959 states and 12236 transitions. [2021-06-12 19:43:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:43:40,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-12 19:43:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:40,622 INFO L225 Difference]: With dead ends: 3959 [2021-06-12 19:43:40,622 INFO L226 Difference]: Without dead ends: 3959 [2021-06-12 19:43:40,622 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:43:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-12 19:43:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3733. [2021-06-12 19:43:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.177652733118971) internal successors, (11859), 3732 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 11859 transitions. [2021-06-12 19:43:40,666 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 11859 transitions. Word has length 20 [2021-06-12 19:43:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:40,666 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 11859 transitions. [2021-06-12 19:43:40,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:43:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 11859 transitions. [2021-06-12 19:43:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:40,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:40,669 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:40,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36817,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:40,870 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash 680381732, now seen corresponding path program 264 times [2021-06-12 19:43:40,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:40,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675888351] [2021-06-12 19:43:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:40,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:40,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675888351] [2021-06-12 19:43:40,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675888351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:40,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658726583] [2021-06-12 19:43:40,912 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 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 [2021-06-12 19:43:40,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:43:40,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:40,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:40,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:40,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658726583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:40,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:40,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:43:40,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488231823] [2021-06-12 19:43:40,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:40,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:40,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:40,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:40,967 INFO L87 Difference]: Start difference. First operand 3733 states and 11859 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:41,056 INFO L93 Difference]: Finished difference Result 4198 states and 12875 transitions. [2021-06-12 19:43:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:43:41,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:43:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:41,060 INFO L225 Difference]: With dead ends: 4198 [2021-06-12 19:43:41,060 INFO L226 Difference]: Without dead ends: 4198 [2021-06-12 19:43:41,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:43:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-06-12 19:43:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3725. [2021-06-12 19:43:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.1766917293233083) internal successors, (11830), 3724 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 11830 transitions. [2021-06-12 19:43:41,103 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 11830 transitions. Word has length 20 [2021-06-12 19:43:41,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:41,103 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 11830 transitions. [2021-06-12 19:43:41,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:41,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 11830 transitions. [2021-06-12 19:43:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:41,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:41,106 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:41,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36818 [2021-06-12 19:43:41,306 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash 174035466, now seen corresponding path program 265 times [2021-06-12 19:43:41,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:41,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211175837] [2021-06-12 19:43:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:41,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:41,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211175837] [2021-06-12 19:43:41,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211175837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:41,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450285277] [2021-06-12 19:43:41,359 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 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 [2021-06-12 19:43:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:41,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:41,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450285277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:41,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:41,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:43:41,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047624188] [2021-06-12 19:43:41,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:41,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:41,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:41,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:41,414 INFO L87 Difference]: Start difference. First operand 3725 states and 11830 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:41,530 INFO L93 Difference]: Finished difference Result 4548 states and 13998 transitions. [2021-06-12 19:43:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:43:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:43:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:41,536 INFO L225 Difference]: With dead ends: 4548 [2021-06-12 19:43:41,536 INFO L226 Difference]: Without dead ends: 4548 [2021-06-12 19:43:41,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:43:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-06-12 19:43:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 3857. [2021-06-12 19:43:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 3.171421161825726) internal successors, (12229), 3856 states have internal predecessors, (12229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 12229 transitions. [2021-06-12 19:43:41,586 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 12229 transitions. Word has length 20 [2021-06-12 19:43:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:41,586 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 12229 transitions. [2021-06-12 19:43:41,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 12229 transitions. [2021-06-12 19:43:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:41,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:41,588 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:41,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36819,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:41,789 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:41,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1657170404, now seen corresponding path program 266 times [2021-06-12 19:43:41,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:41,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163379159] [2021-06-12 19:43:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:41,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163379159] [2021-06-12 19:43:41,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163379159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082133058] [2021-06-12 19:43:41,835 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 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 [2021-06-12 19:43:41,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:41,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:41,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:41,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082133058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:41,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:41,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:43:41,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631504195] [2021-06-12 19:43:41,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:41,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:41,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:41,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:41,888 INFO L87 Difference]: Start difference. First operand 3857 states and 12229 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:42,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:42,051 INFO L93 Difference]: Finished difference Result 5083 states and 15588 transitions. [2021-06-12 19:43:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:43:42,051 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:43:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:42,056 INFO L225 Difference]: With dead ends: 5083 [2021-06-12 19:43:42,056 INFO L226 Difference]: Without dead ends: 5083 [2021-06-12 19:43:42,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:43:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-06-12 19:43:42,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3996. [2021-06-12 19:43:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 3.17171464330413) internal successors, (12671), 3995 states have internal predecessors, (12671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 12671 transitions. [2021-06-12 19:43:42,117 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 12671 transitions. Word has length 20 [2021-06-12 19:43:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:42,117 INFO L482 AbstractCegarLoop]: Abstraction has 3996 states and 12671 transitions. [2021-06-12 19:43:42,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 12671 transitions. [2021-06-12 19:43:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:42,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:42,120 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:42,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36820 [2021-06-12 19:43:42,321 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:42,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:42,321 INFO L82 PathProgramCache]: Analyzing trace with hash -319341737, now seen corresponding path program 267 times [2021-06-12 19:43:42,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:42,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442934007] [2021-06-12 19:43:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:42,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:42,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442934007] [2021-06-12 19:43:42,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442934007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:42,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785789853] [2021-06-12 19:43:42,394 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 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 [2021-06-12 19:43:42,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:43:42,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:42,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:42,730 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 19:43:42,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:43,282 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 268 [2021-06-12 19:43:43,385 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 268 [2021-06-12 19:43:43,511 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 279 [2021-06-12 19:43:43,658 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 351 [2021-06-12 19:43:43,794 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 305 [2021-06-12 19:43:44,193 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 254 [2021-06-12 19:43:44,312 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 254 [2021-06-12 19:43:44,486 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 261 [2021-06-12 19:43:45,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:45,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:45,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:45,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:45,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785789853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:45,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:45,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 19:43:45,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767645887] [2021-06-12 19:43:45,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:43:45,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:45,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:43:45,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:43:45,219 INFO L87 Difference]: Start difference. First operand 3996 states and 12671 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:45,600 INFO L93 Difference]: Finished difference Result 4050 states and 12777 transitions. [2021-06-12 19:43:45,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:43:45,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:43:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:45,604 INFO L225 Difference]: With dead ends: 4050 [2021-06-12 19:43:45,604 INFO L226 Difference]: Without dead ends: 4040 [2021-06-12 19:43:45,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2021-06-12 19:43:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 3997. [2021-06-12 19:43:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3996 states have (on average 3.171921921921922) internal successors, (12675), 3996 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 12675 transitions. [2021-06-12 19:43:45,648 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 12675 transitions. Word has length 20 [2021-06-12 19:43:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:45,648 INFO L482 AbstractCegarLoop]: Abstraction has 3997 states and 12675 transitions. [2021-06-12 19:43:45,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 12675 transitions. [2021-06-12 19:43:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:45,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:45,651 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:45,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36821 [2021-06-12 19:43:45,851 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1918399472, now seen corresponding path program 268 times [2021-06-12 19:43:45,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:45,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500832494] [2021-06-12 19:43:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:45,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:45,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500832494] [2021-06-12 19:43:45,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500832494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:45,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626742188] [2021-06-12 19:43:45,896 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 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 [2021-06-12 19:43:45,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:45,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:45,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:45,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626742188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:45,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:45,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:43:45,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381419695] [2021-06-12 19:43:45,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:45,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:45,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:45,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:45,950 INFO L87 Difference]: Start difference. First operand 3997 states and 12675 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:46,069 INFO L93 Difference]: Finished difference Result 4890 states and 15000 transitions. [2021-06-12 19:43:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:43:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:43:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:46,075 INFO L225 Difference]: With dead ends: 4890 [2021-06-12 19:43:46,075 INFO L226 Difference]: Without dead ends: 4890 [2021-06-12 19:43:46,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:43:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2021-06-12 19:43:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 2217. [2021-06-12 19:43:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.1164259927797833) internal successors, (6906), 2216 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6906 transitions. [2021-06-12 19:43:46,111 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6906 transitions. Word has length 20 [2021-06-12 19:43:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:46,112 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6906 transitions. [2021-06-12 19:43:46,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6906 transitions. [2021-06-12 19:43:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:46,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:46,114 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:46,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37026,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:46,314 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash -893432886, now seen corresponding path program 269 times [2021-06-12 19:43:46,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:46,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111309087] [2021-06-12 19:43:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:46,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:46,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111309087] [2021-06-12 19:43:46,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111309087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:46,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959591667] [2021-06-12 19:43:46,361 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 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 [2021-06-12 19:43:46,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:43:46,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:46,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:46,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959591667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:46,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:46,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:43:46,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857094052] [2021-06-12 19:43:46,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:43:46,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:43:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:43:46,414 INFO L87 Difference]: Start difference. First operand 2217 states and 6906 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:46,581 INFO L93 Difference]: Finished difference Result 3552 states and 10616 transitions. [2021-06-12 19:43:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:43:46,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:43:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:46,585 INFO L225 Difference]: With dead ends: 3552 [2021-06-12 19:43:46,585 INFO L226 Difference]: Without dead ends: 3552 [2021-06-12 19:43:46,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:43:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-06-12 19:43:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 2210. [2021-06-12 19:43:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 3.122227252150294) internal successors, (6897), 2209 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 6897 transitions. [2021-06-12 19:43:46,615 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 6897 transitions. Word has length 20 [2021-06-12 19:43:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:46,615 INFO L482 AbstractCegarLoop]: Abstraction has 2210 states and 6897 transitions. [2021-06-12 19:43:46,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:43:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 6897 transitions. [2021-06-12 19:43:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:46,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:46,617 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:46,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37027 [2021-06-12 19:43:46,817 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1917147897, now seen corresponding path program 270 times [2021-06-12 19:43:46,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:46,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310910361] [2021-06-12 19:43:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:46,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:46,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310910361] [2021-06-12 19:43:46,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310910361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:46,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493232143] [2021-06-12 19:43:46,905 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 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 [2021-06-12 19:43:46,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:43:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:46,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:46,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:47,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:47,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:47,978 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 240 [2021-06-12 19:43:48,207 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 287 [2021-06-12 19:43:48,311 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 237 [2021-06-12 19:43:48,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:48,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:48,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:48,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:48,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493232143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:48,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:48,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:43:48,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873766389] [2021-06-12 19:43:48,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:43:48,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:48,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:43:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:43:48,992 INFO L87 Difference]: Start difference. First operand 2210 states and 6897 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:49,258 INFO L93 Difference]: Finished difference Result 2235 states and 6947 transitions. [2021-06-12 19:43:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:43:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:43:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:49,261 INFO L225 Difference]: With dead ends: 2235 [2021-06-12 19:43:49,261 INFO L226 Difference]: Without dead ends: 2230 [2021-06-12 19:43:49,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-12 19:43:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2208. [2021-06-12 19:43:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.122791119166289) internal successors, (6892), 2207 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6892 transitions. [2021-06-12 19:43:49,282 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6892 transitions. Word has length 20 [2021-06-12 19:43:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:49,283 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6892 transitions. [2021-06-12 19:43:49,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6892 transitions. [2021-06-12 19:43:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:49,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:49,284 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:49,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37028,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:49,485 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:49,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1281932618, now seen corresponding path program 271 times [2021-06-12 19:43:49,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:49,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701098715] [2021-06-12 19:43:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:49,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:49,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701098715] [2021-06-12 19:43:49,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701098715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:49,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129219171] [2021-06-12 19:43:49,541 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 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 [2021-06-12 19:43:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:49,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:49,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129219171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:49,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:49,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:43:49,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918350399] [2021-06-12 19:43:49,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:43:49,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:49,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:43:49,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:43:49,601 INFO L87 Difference]: Start difference. First operand 2208 states and 6892 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:49,709 INFO L93 Difference]: Finished difference Result 2603 states and 7643 transitions. [2021-06-12 19:43:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:43:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:43:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:49,711 INFO L225 Difference]: With dead ends: 2603 [2021-06-12 19:43:49,711 INFO L226 Difference]: Without dead ends: 2603 [2021-06-12 19:43:49,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:43:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-12 19:43:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1561. [2021-06-12 19:43:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.0724358974358976) internal successors, (4793), 1560 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4793 transitions. [2021-06-12 19:43:49,730 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4793 transitions. Word has length 20 [2021-06-12 19:43:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:49,730 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4793 transitions. [2021-06-12 19:43:49,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4793 transitions. [2021-06-12 19:43:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:49,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:49,732 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:49,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37319,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:49,932 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1529899740, now seen corresponding path program 272 times [2021-06-12 19:43:49,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:49,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596754093] [2021-06-12 19:43:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:49,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596754093] [2021-06-12 19:43:49,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596754093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987121443] [2021-06-12 19:43:49,979 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 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 [2021-06-12 19:43:50,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:50,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:50,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:50,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:50,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987121443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:50,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:50,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:43:50,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821098997] [2021-06-12 19:43:50,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:43:50,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:43:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:43:50,039 INFO L87 Difference]: Start difference. First operand 1561 states and 4793 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:50,181 INFO L93 Difference]: Finished difference Result 2319 states and 6788 transitions. [2021-06-12 19:43:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:43:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:43:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:50,183 INFO L225 Difference]: With dead ends: 2319 [2021-06-12 19:43:50,184 INFO L226 Difference]: Without dead ends: 2319 [2021-06-12 19:43:50,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-12 19:43:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1568. [2021-06-12 19:43:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.0855137204850034) internal successors, (4835), 1567 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 4835 transitions. [2021-06-12 19:43:50,202 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 4835 transitions. Word has length 20 [2021-06-12 19:43:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:50,202 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 4835 transitions. [2021-06-12 19:43:50,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 4835 transitions. [2021-06-12 19:43:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:50,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:50,203 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:50,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37320,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:50,404 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:50,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1497610378, now seen corresponding path program 273 times [2021-06-12 19:43:50,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:50,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027902458] [2021-06-12 19:43:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:50,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:50,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027902458] [2021-06-12 19:43:50,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027902458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:50,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916617337] [2021-06-12 19:43:50,460 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 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 [2021-06-12 19:43:50,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:43:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:50,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:50,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916617337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:50,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:50,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:43:50,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148223589] [2021-06-12 19:43:50,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:43:50,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:43:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:43:50,523 INFO L87 Difference]: Start difference. First operand 1568 states and 4835 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:50,735 INFO L93 Difference]: Finished difference Result 2424 states and 7063 transitions. [2021-06-12 19:43:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:43:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:43:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:50,738 INFO L225 Difference]: With dead ends: 2424 [2021-06-12 19:43:50,738 INFO L226 Difference]: Without dead ends: 2424 [2021-06-12 19:43:50,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:43:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-06-12 19:43:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1795. [2021-06-12 19:43:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.092530657748049) internal successors, (5548), 1794 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 5548 transitions. [2021-06-12 19:43:50,759 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 5548 transitions. Word has length 20 [2021-06-12 19:43:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:50,759 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 5548 transitions. [2021-06-12 19:43:50,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 5548 transitions. [2021-06-12 19:43:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:50,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:50,761 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:50,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37321,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:50,962 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2078632399, now seen corresponding path program 274 times [2021-06-12 19:43:50,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:50,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485520063] [2021-06-12 19:43:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:51,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:51,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485520063] [2021-06-12 19:43:51,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485520063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:51,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623534800] [2021-06-12 19:43:51,047 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 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 [2021-06-12 19:43:51,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:43:51,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:51,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:51,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:51,850 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 225 [2021-06-12 19:43:52,501 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 266 [2021-06-12 19:43:52,611 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 303 [2021-06-12 19:43:53,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:53,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:53,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:53,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:53,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623534800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:53,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:53,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:43:53,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294758707] [2021-06-12 19:43:53,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:43:53,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:53,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:43:53,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:43:53,359 INFO L87 Difference]: Start difference. First operand 1795 states and 5548 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:53,709 INFO L93 Difference]: Finished difference Result 1927 states and 5783 transitions. [2021-06-12 19:43:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:43:53,709 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:43:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:53,711 INFO L225 Difference]: With dead ends: 1927 [2021-06-12 19:43:53,711 INFO L226 Difference]: Without dead ends: 1917 [2021-06-12 19:43:53,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:43:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-06-12 19:43:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1800. [2021-06-12 19:43:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.093941078376876) internal successors, (5566), 1799 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5566 transitions. [2021-06-12 19:43:53,730 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5566 transitions. Word has length 20 [2021-06-12 19:43:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:53,730 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 5566 transitions. [2021-06-12 19:43:53,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5566 transitions. [2021-06-12 19:43:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:53,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:53,731 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:53,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37322,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:43:53,932 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:53,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1005776894, now seen corresponding path program 275 times [2021-06-12 19:43:53,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:53,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324531806] [2021-06-12 19:43:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:53,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:53,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324531806] [2021-06-12 19:43:53,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324531806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:53,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354399013] [2021-06-12 19:43:53,979 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 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 [2021-06-12 19:43:54,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:43:54,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:54,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:54,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354399013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:54,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:54,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:43:54,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605795456] [2021-06-12 19:43:54,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:43:54,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:43:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:43:54,041 INFO L87 Difference]: Start difference. First operand 1800 states and 5566 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:54,202 INFO L93 Difference]: Finished difference Result 2241 states and 6581 transitions. [2021-06-12 19:43:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:43:54,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:43:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:54,205 INFO L225 Difference]: With dead ends: 2241 [2021-06-12 19:43:54,205 INFO L226 Difference]: Without dead ends: 2241 [2021-06-12 19:43:54,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:43:54,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-06-12 19:43:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1485. [2021-06-12 19:43:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.0808625336927222) internal successors, (4572), 1484 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4572 transitions. [2021-06-12 19:43:54,222 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4572 transitions. Word has length 20 [2021-06-12 19:43:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:54,222 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 4572 transitions. [2021-06-12 19:43:54,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4572 transitions. [2021-06-12 19:43:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:54,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:54,224 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:54,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37547 [2021-06-12 19:43:54,424 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:54,424 INFO L82 PathProgramCache]: Analyzing trace with hash -261680284, now seen corresponding path program 276 times [2021-06-12 19:43:54,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:54,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734611562] [2021-06-12 19:43:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:54,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:54,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734611562] [2021-06-12 19:43:54,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734611562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:54,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230741342] [2021-06-12 19:43:54,473 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 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 [2021-06-12 19:43:54,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:43:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:54,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:54,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230741342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:54,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:54,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:43:54,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28981161] [2021-06-12 19:43:54,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:43:54,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:54,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:43:54,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:43:54,539 INFO L87 Difference]: Start difference. First operand 1485 states and 4572 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:54,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:54,752 INFO L93 Difference]: Finished difference Result 2226 states and 6445 transitions. [2021-06-12 19:43:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:43:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:43:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:54,754 INFO L225 Difference]: With dead ends: 2226 [2021-06-12 19:43:54,754 INFO L226 Difference]: Without dead ends: 2226 [2021-06-12 19:43:54,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:43:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-12 19:43:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1519. [2021-06-12 19:43:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.0843214756258233) internal successors, (4682), 1518 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4682 transitions. [2021-06-12 19:43:54,771 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4682 transitions. Word has length 20 [2021-06-12 19:43:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:54,771 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4682 transitions. [2021-06-12 19:43:54,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:43:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4682 transitions. [2021-06-12 19:43:54,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:54,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:54,772 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:54,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37548 [2021-06-12 19:43:54,973 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1932074553, now seen corresponding path program 277 times [2021-06-12 19:43:54,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:54,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743786764] [2021-06-12 19:43:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:55,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:55,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743786764] [2021-06-12 19:43:55,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743786764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:55,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760655340] [2021-06-12 19:43:55,061 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 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 [2021-06-12 19:43:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:55,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:43:55,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:55,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:55,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:43:56,008 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 286 [2021-06-12 19:43:56,113 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 286 [2021-06-12 19:43:56,233 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 293 [2021-06-12 19:43:56,385 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 362 [2021-06-12 19:43:57,204 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 276 [2021-06-12 19:43:57,377 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-06-12 19:43:57,534 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-06-12 19:43:57,766 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 334 [2021-06-12 19:43:58,069 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 369 [2021-06-12 19:43:58,303 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 224 [2021-06-12 19:43:59,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:43:59,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:43:59,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:43:59,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:43:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:43:59,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760655340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:59,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:59,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:43:59,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878690243] [2021-06-12 19:43:59,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:43:59,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:59,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:43:59,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:43:59,177 INFO L87 Difference]: Start difference. First operand 1519 states and 4682 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:59,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:59,418 INFO L93 Difference]: Finished difference Result 1555 states and 4757 transitions. [2021-06-12 19:43:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:43:59,418 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:43:59,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:59,420 INFO L225 Difference]: With dead ends: 1555 [2021-06-12 19:43:59,420 INFO L226 Difference]: Without dead ends: 1550 [2021-06-12 19:43:59,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:43:59,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-12 19:43:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1520. [2021-06-12 19:43:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.0849242922975644) internal successors, (4686), 1519 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 4686 transitions. [2021-06-12 19:43:59,435 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 4686 transitions. Word has length 20 [2021-06-12 19:43:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:59,435 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 4686 transitions. [2021-06-12 19:43:59,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 4686 transitions. [2021-06-12 19:43:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:59,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:59,437 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:43:59,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37549 [2021-06-12 19:43:59,637 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:43:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:43:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash -998610844, now seen corresponding path program 278 times [2021-06-12 19:43:59,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:43:59,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081387964] [2021-06-12 19:43:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:43:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:43:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:43:59,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:43:59,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081387964] [2021-06-12 19:43:59,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081387964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:59,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270321869] [2021-06-12 19:43:59,672 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 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 [2021-06-12 19:43:59,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:43:59,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:43:59,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:43:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:43:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:43:59,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270321869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:43:59,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:43:59,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:43:59,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241553986] [2021-06-12 19:43:59,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:43:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:43:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:43:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:43:59,734 INFO L87 Difference]: Start difference. First operand 1520 states and 4686 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:43:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:43:59,800 INFO L93 Difference]: Finished difference Result 1775 states and 5123 transitions. [2021-06-12 19:43:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:43:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 20 [2021-06-12 19:43:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:43:59,802 INFO L225 Difference]: With dead ends: 1775 [2021-06-12 19:43:59,802 INFO L226 Difference]: Without dead ends: 1775 [2021-06-12 19:43:59,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:43:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-12 19:43:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1531. [2021-06-12 19:43:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.08562091503268) internal successors, (4721), 1530 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:43:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4721 transitions. [2021-06-12 19:43:59,817 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4721 transitions. Word has length 20 [2021-06-12 19:43:59,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:43:59,817 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4721 transitions. [2021-06-12 19:43:59,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:43:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4721 transitions. [2021-06-12 19:43:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:43:59,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:43:59,819 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:00,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37970,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:00,019 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:00,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1235496650, now seen corresponding path program 279 times [2021-06-12 19:44:00,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:00,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966246017] [2021-06-12 19:44:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:00,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:00,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966246017] [2021-06-12 19:44:00,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966246017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:00,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894297383] [2021-06-12 19:44:00,059 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 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 [2021-06-12 19:44:00,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:44:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:00,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:00,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894297383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:00,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:00,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:00,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548672945] [2021-06-12 19:44:00,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:00,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:00,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:00,114 INFO L87 Difference]: Start difference. First operand 1531 states and 4721 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:00,198 INFO L93 Difference]: Finished difference Result 1802 states and 5179 transitions. [2021-06-12 19:44:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:44:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-12 19:44:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:00,200 INFO L225 Difference]: With dead ends: 1802 [2021-06-12 19:44:00,200 INFO L226 Difference]: Without dead ends: 1802 [2021-06-12 19:44:00,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:44:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-12 19:44:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1476. [2021-06-12 19:44:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.079322033898305) internal successors, (4542), 1475 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4542 transitions. [2021-06-12 19:44:00,226 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4542 transitions. Word has length 20 [2021-06-12 19:44:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:00,226 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4542 transitions. [2021-06-12 19:44:00,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4542 transitions. [2021-06-12 19:44:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:00,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:00,228 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:00,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37971,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:00,428 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:00,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:00,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1773352228, now seen corresponding path program 280 times [2021-06-12 19:44:00,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:00,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500912004] [2021-06-12 19:44:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:00,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:00,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500912004] [2021-06-12 19:44:00,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500912004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:00,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002355056] [2021-06-12 19:44:00,480 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 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 [2021-06-12 19:44:00,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:00,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:00,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:00,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002355056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:00,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:00,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:44:00,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962126564] [2021-06-12 19:44:00,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:00,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:00,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:00,539 INFO L87 Difference]: Start difference. First operand 1476 states and 4542 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:00,629 INFO L93 Difference]: Finished difference Result 1732 states and 4957 transitions. [2021-06-12 19:44:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:44:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:44:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:00,632 INFO L225 Difference]: With dead ends: 1732 [2021-06-12 19:44:00,632 INFO L226 Difference]: Without dead ends: 1732 [2021-06-12 19:44:00,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:44:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-06-12 19:44:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1312. [2021-06-12 19:44:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.0671243325705566) internal successors, (4021), 1311 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4021 transitions. [2021-06-12 19:44:00,647 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4021 transitions. Word has length 20 [2021-06-12 19:44:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:00,647 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 4021 transitions. [2021-06-12 19:44:00,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4021 transitions. [2021-06-12 19:44:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:00,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:00,648 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:00,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37972,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:00,849 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1544826396, now seen corresponding path program 281 times [2021-06-12 19:44:00,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:00,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240263166] [2021-06-12 19:44:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:00,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:00,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240263166] [2021-06-12 19:44:00,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240263166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:00,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158737035] [2021-06-12 19:44:00,896 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 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 [2021-06-12 19:44:00,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:44:00,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:00,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:00,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:00,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158737035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:00,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:00,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:00,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147468922] [2021-06-12 19:44:00,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:00,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:00,957 INFO L87 Difference]: Start difference. First operand 1312 states and 4021 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:01,074 INFO L93 Difference]: Finished difference Result 1787 states and 5216 transitions. [2021-06-12 19:44:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:44:01,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:44:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:01,077 INFO L225 Difference]: With dead ends: 1787 [2021-06-12 19:44:01,077 INFO L226 Difference]: Without dead ends: 1787 [2021-06-12 19:44:01,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:44:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-06-12 19:44:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1538. [2021-06-12 19:44:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.0709173715029277) internal successors, (4720), 1537 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4720 transitions. [2021-06-12 19:44:01,093 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4720 transitions. Word has length 20 [2021-06-12 19:44:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:01,093 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4720 transitions. [2021-06-12 19:44:01,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4720 transitions. [2021-06-12 19:44:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:01,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:01,094 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:01,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37973 [2021-06-12 19:44:01,294 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:01,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1482683722, now seen corresponding path program 282 times [2021-06-12 19:44:01,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:01,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262883253] [2021-06-12 19:44:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:01,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262883253] [2021-06-12 19:44:01,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262883253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81961289] [2021-06-12 19:44:01,344 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 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 [2021-06-12 19:44:01,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:44:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:01,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:01,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:01,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81961289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:01,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:01,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085604937] [2021-06-12 19:44:01,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:01,412 INFO L87 Difference]: Start difference. First operand 1538 states and 4720 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:01,577 INFO L93 Difference]: Finished difference Result 1812 states and 5269 transitions. [2021-06-12 19:44:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:01,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:44:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:01,579 INFO L225 Difference]: With dead ends: 1812 [2021-06-12 19:44:01,579 INFO L226 Difference]: Without dead ends: 1812 [2021-06-12 19:44:01,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:44:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-12 19:44:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1587. [2021-06-12 19:44:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.0687263556116013) internal successors, (4867), 1586 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4867 transitions. [2021-06-12 19:44:01,595 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4867 transitions. Word has length 20 [2021-06-12 19:44:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:01,595 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4867 transitions. [2021-06-12 19:44:01,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4867 transitions. [2021-06-12 19:44:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:01,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:01,597 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:01,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37974 [2021-06-12 19:44:01,797 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:01,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:01,798 INFO L82 PathProgramCache]: Analyzing trace with hash 846216868, now seen corresponding path program 283 times [2021-06-12 19:44:01,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:01,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293147000] [2021-06-12 19:44:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:01,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:01,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293147000] [2021-06-12 19:44:01,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293147000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:01,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458203240] [2021-06-12 19:44:01,851 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 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 [2021-06-12 19:44:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:01,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:01,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458203240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:01,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:01,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:01,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461759686] [2021-06-12 19:44:01,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:01,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:01,913 INFO L87 Difference]: Start difference. First operand 1587 states and 4867 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:02,126 INFO L93 Difference]: Finished difference Result 1938 states and 5602 transitions. [2021-06-12 19:44:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:44:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:44:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:02,128 INFO L225 Difference]: With dead ends: 1938 [2021-06-12 19:44:02,128 INFO L226 Difference]: Without dead ends: 1938 [2021-06-12 19:44:02,128 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:44:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-06-12 19:44:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1604. [2021-06-12 19:44:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.0679975046787273) internal successors, (4918), 1603 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 4918 transitions. [2021-06-12 19:44:02,146 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 4918 transitions. Word has length 20 [2021-06-12 19:44:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:02,146 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 4918 transitions. [2021-06-12 19:44:02,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 4918 transitions. [2021-06-12 19:44:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:02,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:02,147 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:02,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37975 [2021-06-12 19:44:02,348 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:02,348 INFO L82 PathProgramCache]: Analyzing trace with hash -782068073, now seen corresponding path program 284 times [2021-06-12 19:44:02,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:02,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550273005] [2021-06-12 19:44:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:02,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:02,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550273005] [2021-06-12 19:44:02,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550273005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:02,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948062594] [2021-06-12 19:44:02,444 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 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 [2021-06-12 19:44:02,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:02,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:44:02,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:02,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:02,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:44:03,332 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 303 [2021-06-12 19:44:03,463 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-06-12 19:44:03,597 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-06-12 19:44:03,757 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 336 [2021-06-12 19:44:03,912 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 288 [2021-06-12 19:44:04,042 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-06-12 19:44:04,177 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 297 [2021-06-12 19:44:04,697 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 270 [2021-06-12 19:44:04,800 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 270 [2021-06-12 19:44:04,915 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 240 [2021-06-12 19:44:05,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:44:05,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:05,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:44:05,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:44:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:05,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948062594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:05,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:05,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:44:05,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863480168] [2021-06-12 19:44:05,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:44:05,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:44:05,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:44:05,625 INFO L87 Difference]: Start difference. First operand 1604 states and 4918 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:06,150 INFO L93 Difference]: Finished difference Result 1808 states and 5373 transitions. [2021-06-12 19:44:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:44:06,150 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:44:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:06,152 INFO L225 Difference]: With dead ends: 1808 [2021-06-12 19:44:06,152 INFO L226 Difference]: Without dead ends: 1798 [2021-06-12 19:44:06,153 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:44:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-06-12 19:44:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1653. [2021-06-12 19:44:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-06-12 19:44:06,170 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-06-12 19:44:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:06,170 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-06-12 19:44:06,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:06,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-06-12 19:44:06,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:06,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:06,172 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:06,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37976 [2021-06-12 19:44:06,372 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash -395866959, now seen corresponding path program 285 times [2021-06-12 19:44:06,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:06,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965842632] [2021-06-12 19:44:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:06,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965842632] [2021-06-12 19:44:06,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965842632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432907074] [2021-06-12 19:44:06,468 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 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 [2021-06-12 19:44:06,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:44:06,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:44:06,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:06,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:06,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:44:07,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:44:07,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:07,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:44:07,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:44:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:07,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432907074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:07,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:07,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 19:44:07,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702820118] [2021-06-12 19:44:07,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:44:07,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:07,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:44:07,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:44:07,740 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:08,230 INFO L93 Difference]: Finished difference Result 1770 states and 5320 transitions. [2021-06-12 19:44:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:44:08,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:44:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:08,232 INFO L225 Difference]: With dead ends: 1770 [2021-06-12 19:44:08,232 INFO L226 Difference]: Without dead ends: 1765 [2021-06-12 19:44:08,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:44:08,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-12 19:44:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1653. [2021-06-12 19:44:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-06-12 19:44:08,251 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-06-12 19:44:08,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:08,251 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-06-12 19:44:08,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-06-12 19:44:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:08,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:08,252 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:08,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38314 [2021-06-12 19:44:08,453 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1057130742, now seen corresponding path program 286 times [2021-06-12 19:44:08,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:08,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309087522] [2021-06-12 19:44:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:08,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:08,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309087522] [2021-06-12 19:44:08,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309087522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:08,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357320977] [2021-06-12 19:44:08,502 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 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 [2021-06-12 19:44:08,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:08,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:08,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:08,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:08,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357320977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:08,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:08,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:08,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830388223] [2021-06-12 19:44:08,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:08,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:08,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:08,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:08,556 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:08,628 INFO L93 Difference]: Finished difference Result 1988 states and 5715 transitions. [2021-06-12 19:44:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:44:08,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-12 19:44:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:08,630 INFO L225 Difference]: With dead ends: 1988 [2021-06-12 19:44:08,630 INFO L226 Difference]: Without dead ends: 1988 [2021-06-12 19:44:08,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-06-12 19:44:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1661. [2021-06-12 19:44:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.0897590361445784) internal successors, (5129), 1660 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5129 transitions. [2021-06-12 19:44:08,649 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5129 transitions. Word has length 20 [2021-06-12 19:44:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:08,649 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5129 transitions. [2021-06-12 19:44:08,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5129 transitions. [2021-06-12 19:44:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:08,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:08,651 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:08,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38486,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:08,851 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:08,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:08,852 INFO L82 PathProgramCache]: Analyzing trace with hash 757652935, now seen corresponding path program 287 times [2021-06-12 19:44:08,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:08,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358499865] [2021-06-12 19:44:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:08,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:08,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358499865] [2021-06-12 19:44:08,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358499865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:08,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794265464] [2021-06-12 19:44:08,934 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 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 [2021-06-12 19:44:08,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:44:08,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:08,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:44:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:09,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:09,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:44:10,117 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 259 [2021-06-12 19:44:10,537 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 255 [2021-06-12 19:44:10,678 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 214 [2021-06-12 19:44:11,103 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 336 [2021-06-12 19:44:11,370 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-06-12 19:44:11,654 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-06-12 19:44:11,949 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 380 [2021-06-12 19:44:12,246 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 478 [2021-06-12 19:44:12,451 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 322 [2021-06-12 19:44:13,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:44:13,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:13,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:44:13,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:44:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:13,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794265464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:13,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:13,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:44:13,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996704538] [2021-06-12 19:44:13,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:44:13,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:44:13,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:13,034 INFO L87 Difference]: Start difference. First operand 1661 states and 5129 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:13,358 INFO L93 Difference]: Finished difference Result 1764 states and 5293 transitions. [2021-06-12 19:44:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:44:13,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:44:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:13,360 INFO L225 Difference]: With dead ends: 1764 [2021-06-12 19:44:13,360 INFO L226 Difference]: Without dead ends: 1737 [2021-06-12 19:44:13,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:44:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-06-12 19:44:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1661. [2021-06-12 19:44:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.075903614457831) internal successors, (5106), 1660 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5106 transitions. [2021-06-12 19:44:13,376 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5106 transitions. Word has length 20 [2021-06-12 19:44:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:13,376 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5106 transitions. [2021-06-12 19:44:13,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5106 transitions. [2021-06-12 19:44:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:13,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:13,378 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:13,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38487,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:13,578 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1034884042, now seen corresponding path program 288 times [2021-06-12 19:44:13,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:13,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081040016] [2021-06-12 19:44:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:13,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:13,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081040016] [2021-06-12 19:44:13,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081040016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:13,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648083245] [2021-06-12 19:44:13,630 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 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 [2021-06-12 19:44:13,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:44:13,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:13,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:13,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:13,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648083245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:13,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:13,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:13,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551836983] [2021-06-12 19:44:13,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:13,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:13,692 INFO L87 Difference]: Start difference. First operand 1661 states and 5106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:13,912 INFO L93 Difference]: Finished difference Result 2203 states and 6445 transitions. [2021-06-12 19:44:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:44:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:13,915 INFO L225 Difference]: With dead ends: 2203 [2021-06-12 19:44:13,915 INFO L226 Difference]: Without dead ends: 2203 [2021-06-12 19:44:13,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:44:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-12 19:44:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1708. [2021-06-12 19:44:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.074985354422964) internal successors, (5249), 1707 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5249 transitions. [2021-06-12 19:44:13,936 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5249 transitions. Word has length 20 [2021-06-12 19:44:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:13,936 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5249 transitions. [2021-06-12 19:44:13,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5249 transitions. [2021-06-12 19:44:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:13,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:13,938 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:14,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38706 [2021-06-12 19:44:14,138 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:14,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1515719248, now seen corresponding path program 289 times [2021-06-12 19:44:14,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:14,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044107408] [2021-06-12 19:44:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:14,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:14,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044107408] [2021-06-12 19:44:14,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044107408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:14,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866941525] [2021-06-12 19:44:14,190 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 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 [2021-06-12 19:44:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:14,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:14,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866941525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:14,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:14,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:14,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017224163] [2021-06-12 19:44:14,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:14,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:14,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:14,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:14,248 INFO L87 Difference]: Start difference. First operand 1708 states and 5249 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:14,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:14,423 INFO L93 Difference]: Finished difference Result 1957 states and 5754 transitions. [2021-06-12 19:44:14,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:44:14,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:44:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:14,426 INFO L225 Difference]: With dead ends: 1957 [2021-06-12 19:44:14,426 INFO L226 Difference]: Without dead ends: 1957 [2021-06-12 19:44:14,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:44:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-06-12 19:44:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1714. [2021-06-12 19:44:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.0758902510215997) internal successors, (5269), 1713 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5269 transitions. [2021-06-12 19:44:14,444 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5269 transitions. Word has length 20 [2021-06-12 19:44:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:14,444 INFO L482 AbstractCegarLoop]: Abstraction has 1714 states and 5269 transitions. [2021-06-12 19:44:14,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5269 transitions. [2021-06-12 19:44:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:14,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:14,445 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:14,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38707,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:14,646 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2142781194, now seen corresponding path program 290 times [2021-06-12 19:44:14,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:14,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245424180] [2021-06-12 19:44:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:14,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:14,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245424180] [2021-06-12 19:44:14,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245424180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:14,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036206619] [2021-06-12 19:44:14,701 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 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 [2021-06-12 19:44:14,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:14,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:14,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:14,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:14,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036206619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:14,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:14,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:14,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79879580] [2021-06-12 19:44:14,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:14,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:14,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:14,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:14,760 INFO L87 Difference]: Start difference. First operand 1714 states and 5269 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:14,966 INFO L93 Difference]: Finished difference Result 2009 states and 5887 transitions. [2021-06-12 19:44:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:44:14,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:44:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:14,968 INFO L225 Difference]: With dead ends: 2009 [2021-06-12 19:44:14,968 INFO L226 Difference]: Without dead ends: 2009 [2021-06-12 19:44:14,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:44:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-06-12 19:44:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1728. [2021-06-12 19:44:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 3.0752750434279097) internal successors, (5311), 1727 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 5311 transitions. [2021-06-12 19:44:14,986 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5311 transitions. Word has length 20 [2021-06-12 19:44:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:14,986 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 5311 transitions. [2021-06-12 19:44:14,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 5311 transitions. [2021-06-12 19:44:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:14,987 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:14,988 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:15,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38708,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:15,188 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:15,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1900166407, now seen corresponding path program 291 times [2021-06-12 19:44:15,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:15,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767217336] [2021-06-12 19:44:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:15,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:15,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767217336] [2021-06-12 19:44:15,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767217336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:15,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211755405] [2021-06-12 19:44:15,277 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 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 [2021-06-12 19:44:15,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:44:15,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:15,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 19:44:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:15,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:15,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:44:18,094 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 338 [2021-06-12 19:44:18,370 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 779 DAG size of output: 474 [2021-06-12 19:44:18,753 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 524 [2021-06-12 19:44:19,223 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-06-12 19:44:19,706 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-06-12 19:44:20,234 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 580 [2021-06-12 19:44:20,872 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 697 [2021-06-12 19:44:21,199 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 342 [2021-06-12 19:44:22,120 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 493 [2021-06-12 19:44:22,367 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 440 [2021-06-12 19:44:22,626 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 314 [2021-06-12 19:44:22,877 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 363 [2021-06-12 19:44:23,223 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 431 [2021-06-12 19:44:23,441 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 443 [2021-06-12 19:44:23,700 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 498 [2021-06-12 19:44:24,028 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-06-12 19:44:24,344 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-06-12 19:44:24,699 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 496 [2021-06-12 19:44:24,903 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 340 [2021-06-12 19:44:25,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:44:25,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:25,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:44:25,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:44:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:25,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211755405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:25,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:25,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:44:25,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643576603] [2021-06-12 19:44:25,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:44:25,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:44:25,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:25,546 INFO L87 Difference]: Start difference. First operand 1728 states and 5311 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:25,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:25,921 INFO L93 Difference]: Finished difference Result 1933 states and 5906 transitions. [2021-06-12 19:44:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:25,922 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:44:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:25,924 INFO L225 Difference]: With dead ends: 1933 [2021-06-12 19:44:25,924 INFO L226 Difference]: Without dead ends: 1928 [2021-06-12 19:44:25,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:44:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-12 19:44:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1883. [2021-06-12 19:44:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-06-12 19:44:25,944 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-06-12 19:44:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:25,944 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-06-12 19:44:25,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-06-12 19:44:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:25,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:25,945 INFO L472 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:26,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38709 [2021-06-12 19:44:26,146 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash -800073397, now seen corresponding path program 292 times [2021-06-12 19:44:26,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:26,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469811857] [2021-06-12 19:44:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:26,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:26,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469811857] [2021-06-12 19:44:26,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469811857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711377235] [2021-06-12 19:44:26,237 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 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 [2021-06-12 19:44:26,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:26,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:26,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 19:44:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:26,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:26,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-12 19:44:27,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:44:27,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:44:27,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:44:27,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-12 19:44:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:27,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711377235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:27,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:27,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 19:44:27,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419237318] [2021-06-12 19:44:27,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:44:27,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:44:27,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:27,488 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:28,130 INFO L93 Difference]: Finished difference Result 1955 states and 5932 transitions. [2021-06-12 19:44:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:44:28,131 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-06-12 19:44:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:28,133 INFO L225 Difference]: With dead ends: 1955 [2021-06-12 19:44:28,133 INFO L226 Difference]: Without dead ends: 1950 [2021-06-12 19:44:28,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:44:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-12 19:44:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1883. [2021-06-12 19:44:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-06-12 19:44:28,153 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-06-12 19:44:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:28,154 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-06-12 19:44:28,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-06-12 19:44:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:28,155 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:28,155 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:28,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39426,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:28,356 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:28,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1461337180, now seen corresponding path program 293 times [2021-06-12 19:44:28,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:28,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089037317] [2021-06-12 19:44:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:28,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:28,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089037317] [2021-06-12 19:44:28,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089037317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:28,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391261259] [2021-06-12 19:44:28,398 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 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 [2021-06-12 19:44:28,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:28,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:28,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391261259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:28,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:28,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:28,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704528211] [2021-06-12 19:44:28,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:28,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:28,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:28,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:28,470 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:28,550 INFO L93 Difference]: Finished difference Result 2214 states and 6381 transitions. [2021-06-12 19:44:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:44:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-12 19:44:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:28,553 INFO L225 Difference]: With dead ends: 2214 [2021-06-12 19:44:28,553 INFO L226 Difference]: Without dead ends: 2214 [2021-06-12 19:44:28,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-12 19:44:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1898. [2021-06-12 19:44:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.084343700579863) internal successors, (5851), 1897 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 5851 transitions. [2021-06-12 19:44:28,575 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 5851 transitions. Word has length 20 [2021-06-12 19:44:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:28,575 INFO L482 AbstractCegarLoop]: Abstraction has 1898 states and 5851 transitions. [2021-06-12 19:44:28,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 5851 transitions. [2021-06-12 19:44:28,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:28,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:28,577 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:28,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39600,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:28,778 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash 772770314, now seen corresponding path program 294 times [2021-06-12 19:44:28,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:28,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145591654] [2021-06-12 19:44:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:28,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145591654] [2021-06-12 19:44:28,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145591654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687172532] [2021-06-12 19:44:28,818 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 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 [2021-06-12 19:44:28,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:44:28,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:28,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:28,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:28,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687172532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:28,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:28,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:28,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496367246] [2021-06-12 19:44:28,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:28,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:28,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:28,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:28,873 INFO L87 Difference]: Start difference. First operand 1898 states and 5851 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:28,978 INFO L93 Difference]: Finished difference Result 2225 states and 6496 transitions. [2021-06-12 19:44:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:44:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-12 19:44:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:28,980 INFO L225 Difference]: With dead ends: 2225 [2021-06-12 19:44:28,980 INFO L226 Difference]: Without dead ends: 2225 [2021-06-12 19:44:28,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:44:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-12 19:44:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1963. [2021-06-12 19:44:28,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.0866462793068297) internal successors, (6056), 1962 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6056 transitions. [2021-06-12 19:44:29,001 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6056 transitions. Word has length 20 [2021-06-12 19:44:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:29,001 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 6056 transitions. [2021-06-12 19:44:29,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6056 transitions. [2021-06-12 19:44:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:29,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:29,003 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:29,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39601 [2021-06-12 19:44:29,210 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:29,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:29,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1310625892, now seen corresponding path program 295 times [2021-06-12 19:44:29,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:29,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595134653] [2021-06-12 19:44:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:29,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595134653] [2021-06-12 19:44:29,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595134653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768154341] [2021-06-12 19:44:29,251 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 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 [2021-06-12 19:44:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:29,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:29,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:29,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768154341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:29,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:29,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:44:29,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858659655] [2021-06-12 19:44:29,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:29,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:29,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:29,310 INFO L87 Difference]: Start difference. First operand 1963 states and 6056 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:29,428 INFO L93 Difference]: Finished difference Result 2251 states and 6550 transitions. [2021-06-12 19:44:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:44:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:44:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:29,430 INFO L225 Difference]: With dead ends: 2251 [2021-06-12 19:44:29,430 INFO L226 Difference]: Without dead ends: 2251 [2021-06-12 19:44:29,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-12 19:44:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1967. [2021-06-12 19:44:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.084944048830112) internal successors, (6065), 1966 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6065 transitions. [2021-06-12 19:44:29,451 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6065 transitions. Word has length 20 [2021-06-12 19:44:29,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:29,452 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 6065 transitions. [2021-06-12 19:44:29,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6065 transitions. [2021-06-12 19:44:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:29,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:29,453 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:29,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39602 [2021-06-12 19:44:29,654 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:29,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2007552732, now seen corresponding path program 296 times [2021-06-12 19:44:29,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:29,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886969424] [2021-06-12 19:44:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:29,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:29,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886969424] [2021-06-12 19:44:29,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886969424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:29,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733234267] [2021-06-12 19:44:29,700 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 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 [2021-06-12 19:44:29,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:29,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:29,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733234267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:29,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:29,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:44:29,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376697] [2021-06-12 19:44:29,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:29,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:29,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:29,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:29,757 INFO L87 Difference]: Start difference. First operand 1967 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:29,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:29,829 INFO L93 Difference]: Finished difference Result 2072 states and 6290 transitions. [2021-06-12 19:44:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:44:29,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-12 19:44:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:29,832 INFO L225 Difference]: With dead ends: 2072 [2021-06-12 19:44:29,832 INFO L226 Difference]: Without dead ends: 2072 [2021-06-12 19:44:29,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:44:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-12 19:44:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2004. [2021-06-12 19:44:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.0833749375936095) internal successors, (6176), 2003 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6176 transitions. [2021-06-12 19:44:29,851 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6176 transitions. Word has length 20 [2021-06-12 19:44:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:29,851 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6176 transitions. [2021-06-12 19:44:29,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6176 transitions. [2021-06-12 19:44:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:29,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:29,853 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:30,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39603 [2021-06-12 19:44:30,054 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1019957386, now seen corresponding path program 297 times [2021-06-12 19:44:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:30,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610804350] [2021-06-12 19:44:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:30,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:30,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610804350] [2021-06-12 19:44:30,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610804350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:30,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294916884] [2021-06-12 19:44:30,104 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 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 [2021-06-12 19:44:30,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:44:30,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:30,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:30,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294916884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:30,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:30,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:30,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476165416] [2021-06-12 19:44:30,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:30,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:30,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:30,160 INFO L87 Difference]: Start difference. First operand 2004 states and 6176 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:30,283 INFO L93 Difference]: Finished difference Result 2124 states and 6392 transitions. [2021-06-12 19:44:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:44:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:44:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:30,285 INFO L225 Difference]: With dead ends: 2124 [2021-06-12 19:44:30,285 INFO L226 Difference]: Without dead ends: 2124 [2021-06-12 19:44:30,285 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-12 19:44:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2003. [2021-06-12 19:44:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.083416583416583) internal successors, (6173), 2002 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6173 transitions. [2021-06-12 19:44:30,305 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6173 transitions. Word has length 20 [2021-06-12 19:44:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:30,305 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6173 transitions. [2021-06-12 19:44:30,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6173 transitions. [2021-06-12 19:44:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:30,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:30,307 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:30,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39604 [2021-06-12 19:44:30,508 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:30,508 INFO L82 PathProgramCache]: Analyzing trace with hash 383490532, now seen corresponding path program 298 times [2021-06-12 19:44:30,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:30,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011677258] [2021-06-12 19:44:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:30,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:30,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011677258] [2021-06-12 19:44:30,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011677258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:30,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546233430] [2021-06-12 19:44:30,562 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 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 [2021-06-12 19:44:30,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:30,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:30,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:30,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546233430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:30,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:30,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:30,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259562193] [2021-06-12 19:44:30,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:30,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:30,620 INFO L87 Difference]: Start difference. First operand 2003 states and 6173 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:30,788 INFO L93 Difference]: Finished difference Result 2203 states and 6584 transitions. [2021-06-12 19:44:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:30,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:44:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:30,791 INFO L225 Difference]: With dead ends: 2203 [2021-06-12 19:44:30,791 INFO L226 Difference]: Without dead ends: 2203 [2021-06-12 19:44:30,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:44:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-12 19:44:30,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2015. [2021-06-12 19:44:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.08291956305859) internal successors, (6209), 2014 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6209 transitions. [2021-06-12 19:44:30,812 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6209 transitions. Word has length 20 [2021-06-12 19:44:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:30,812 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6209 transitions. [2021-06-12 19:44:30,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6209 transitions. [2021-06-12 19:44:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:44:30,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:30,814 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:31,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39605 [2021-06-12 19:44:31,014 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:31,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2127854538, now seen corresponding path program 299 times [2021-06-12 19:44:31,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:31,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310963201] [2021-06-12 19:44:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:31,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:31,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310963201] [2021-06-12 19:44:31,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310963201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:31,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178096195] [2021-06-12 19:44:31,074 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 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 [2021-06-12 19:44:31,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:31,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:31,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:44:31,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:31,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178096195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:31,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:31,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:31,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028509437] [2021-06-12 19:44:31,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:31,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:31,133 INFO L87 Difference]: Start difference. First operand 2015 states and 6209 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:31,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:31,323 INFO L93 Difference]: Finished difference Result 2375 states and 7049 transitions. [2021-06-12 19:44:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:44:31,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-12 19:44:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:31,326 INFO L225 Difference]: With dead ends: 2375 [2021-06-12 19:44:31,326 INFO L226 Difference]: Without dead ends: 2375 [2021-06-12 19:44:31,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:44:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-12 19:44:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2034. [2021-06-12 19:44:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 3.0821446138711264) internal successors, (6266), 2033 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 6266 transitions. [2021-06-12 19:44:31,347 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 6266 transitions. Word has length 20 [2021-06-12 19:44:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:31,347 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 6266 transitions. [2021-06-12 19:44:31,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-06-12 19:44:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 6266 transitions. [2021-06-12 19:44:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:31,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:31,349 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:31,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39606,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:31,549 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:31,550 INFO L82 PathProgramCache]: Analyzing trace with hash 248568699, now seen corresponding path program 300 times [2021-06-12 19:44:31,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:31,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721066155] [2021-06-12 19:44:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:31,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:31,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721066155] [2021-06-12 19:44:31,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721066155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:31,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250258690] [2021-06-12 19:44:31,612 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 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 [2021-06-12 19:44:31,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:44:31,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:31,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:31,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250258690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:31,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:31,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:31,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045527803] [2021-06-12 19:44:31,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:31,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:31,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:31,675 INFO L87 Difference]: Start difference. First operand 2034 states and 6266 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:31,801 INFO L93 Difference]: Finished difference Result 2216 states and 6557 transitions. [2021-06-12 19:44:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:44:31,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:31,804 INFO L225 Difference]: With dead ends: 2216 [2021-06-12 19:44:31,804 INFO L226 Difference]: Without dead ends: 2212 [2021-06-12 19:44:31,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-12 19:44:31,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2020. [2021-06-12 19:44:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.0787518573551265) internal successors, (6216), 2019 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6216 transitions. [2021-06-12 19:44:31,825 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6216 transitions. Word has length 21 [2021-06-12 19:44:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:31,825 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 6216 transitions. [2021-06-12 19:44:31,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6216 transitions. [2021-06-12 19:44:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:31,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:31,827 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:32,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39607 [2021-06-12 19:44:32,027 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:32,028 INFO L82 PathProgramCache]: Analyzing trace with hash 905361256, now seen corresponding path program 301 times [2021-06-12 19:44:32,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:32,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819342779] [2021-06-12 19:44:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:32,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:32,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819342779] [2021-06-12 19:44:32,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819342779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:32,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905105563] [2021-06-12 19:44:32,094 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 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 [2021-06-12 19:44:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:32,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905105563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:32,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:32,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:32,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277087905] [2021-06-12 19:44:32,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:32,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:32,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:32,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:32,149 INFO L87 Difference]: Start difference. First operand 2020 states and 6216 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:32,373 INFO L93 Difference]: Finished difference Result 2358 states and 6864 transitions. [2021-06-12 19:44:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:44:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:32,376 INFO L225 Difference]: With dead ends: 2358 [2021-06-12 19:44:32,376 INFO L226 Difference]: Without dead ends: 2351 [2021-06-12 19:44:32,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:44:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-12 19:44:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1996. [2021-06-12 19:44:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0716791979949876) internal successors, (6128), 1995 states have internal predecessors, (6128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6128 transitions. [2021-06-12 19:44:32,398 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6128 transitions. Word has length 21 [2021-06-12 19:44:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:32,398 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6128 transitions. [2021-06-12 19:44:32,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6128 transitions. [2021-06-12 19:44:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:32,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:32,400 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:32,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39608 [2021-06-12 19:44:32,601 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1825157759, now seen corresponding path program 302 times [2021-06-12 19:44:32,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:32,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697719373] [2021-06-12 19:44:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:32,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:32,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697719373] [2021-06-12 19:44:32,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697719373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:32,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547875770] [2021-06-12 19:44:32,663 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 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 [2021-06-12 19:44:32,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:32,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:32,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:32,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:32,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547875770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:32,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:32,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:44:32,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032587464] [2021-06-12 19:44:32,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:32,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:32,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:32,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:32,718 INFO L87 Difference]: Start difference. First operand 1996 states and 6128 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:32,835 INFO L93 Difference]: Finished difference Result 2055 states and 6217 transitions. [2021-06-12 19:44:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:44:32,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:32,837 INFO L225 Difference]: With dead ends: 2055 [2021-06-12 19:44:32,837 INFO L226 Difference]: Without dead ends: 2051 [2021-06-12 19:44:32,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-12 19:44:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1996. [2021-06-12 19:44:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.069674185463659) internal successors, (6124), 1995 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6124 transitions. [2021-06-12 19:44:32,856 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6124 transitions. Word has length 21 [2021-06-12 19:44:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:32,856 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6124 transitions. [2021-06-12 19:44:32,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6124 transitions. [2021-06-12 19:44:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:32,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:32,858 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:33,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39609,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:33,058 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:33,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1163893976, now seen corresponding path program 303 times [2021-06-12 19:44:33,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:33,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222685839] [2021-06-12 19:44:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:33,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:33,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222685839] [2021-06-12 19:44:33,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222685839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:33,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642669244] [2021-06-12 19:44:33,109 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 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 [2021-06-12 19:44:33,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:44:33,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:33,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642669244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:33,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:33,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:44:33,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339167650] [2021-06-12 19:44:33,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:33,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:33,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:33,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:33,172 INFO L87 Difference]: Start difference. First operand 1996 states and 6124 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:33,237 INFO L93 Difference]: Finished difference Result 2326 states and 6716 transitions. [2021-06-12 19:44:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:44:33,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:33,239 INFO L225 Difference]: With dead ends: 2326 [2021-06-12 19:44:33,239 INFO L226 Difference]: Without dead ends: 2326 [2021-06-12 19:44:33,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-12 19:44:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1980. [2021-06-12 19:44:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.064679130874179) internal successors, (6065), 1979 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6065 transitions. [2021-06-12 19:44:33,262 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6065 transitions. Word has length 21 [2021-06-12 19:44:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:33,262 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6065 transitions. [2021-06-12 19:44:33,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6065 transitions. [2021-06-12 19:44:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:33,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:33,263 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:33,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39610 [2021-06-12 19:44:33,464 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1822635909, now seen corresponding path program 304 times [2021-06-12 19:44:33,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:33,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156526992] [2021-06-12 19:44:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:33,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:33,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156526992] [2021-06-12 19:44:33,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156526992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:33,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784348865] [2021-06-12 19:44:33,514 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 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 [2021-06-12 19:44:33,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:33,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:33,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784348865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:33,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:33,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:44:33,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447744841] [2021-06-12 19:44:33,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:33,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:33,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:33,572 INFO L87 Difference]: Start difference. First operand 1980 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:33,681 INFO L93 Difference]: Finished difference Result 2084 states and 6271 transitions. [2021-06-12 19:44:33,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:33,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:33,684 INFO L225 Difference]: With dead ends: 2084 [2021-06-12 19:44:33,684 INFO L226 Difference]: Without dead ends: 2076 [2021-06-12 19:44:33,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:44:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-06-12 19:44:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1988. [2021-06-12 19:44:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.06341217916457) internal successors, (6087), 1987 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 6087 transitions. [2021-06-12 19:44:33,705 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 6087 transitions. Word has length 21 [2021-06-12 19:44:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:33,705 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 6087 transitions. [2021-06-12 19:44:33,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 6087 transitions. [2021-06-12 19:44:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:33,707 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:33,707 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:33,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39611,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:33,907 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -865456514, now seen corresponding path program 305 times [2021-06-12 19:44:33,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:33,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984938660] [2021-06-12 19:44:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:33,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:33,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984938660] [2021-06-12 19:44:33,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984938660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:33,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116201543] [2021-06-12 19:44:33,962 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 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 [2021-06-12 19:44:33,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:44:33,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:33,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:34,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116201543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:34,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:34,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:44:34,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519352534] [2021-06-12 19:44:34,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:34,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:34,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:34,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:34,022 INFO L87 Difference]: Start difference. First operand 1988 states and 6087 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:34,109 INFO L93 Difference]: Finished difference Result 2431 states and 6990 transitions. [2021-06-12 19:44:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:44:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:34,111 INFO L225 Difference]: With dead ends: 2431 [2021-06-12 19:44:34,111 INFO L226 Difference]: Without dead ends: 2431 [2021-06-12 19:44:34,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:44:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-12 19:44:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1991. [2021-06-12 19:44:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.063819095477387) internal successors, (6097), 1990 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 6097 transitions. [2021-06-12 19:44:34,133 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 6097 transitions. Word has length 21 [2021-06-12 19:44:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:34,133 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 6097 transitions. [2021-06-12 19:44:34,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 6097 transitions. [2021-06-12 19:44:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:34,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:34,135 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:34,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39612 [2021-06-12 19:44:34,335 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1059877375, now seen corresponding path program 306 times [2021-06-12 19:44:34,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:34,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322529908] [2021-06-12 19:44:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:34,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:34,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322529908] [2021-06-12 19:44:34,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322529908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:34,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688941847] [2021-06-12 19:44:34,387 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 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 [2021-06-12 19:44:34,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:44:34,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:34,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:34,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:34,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688941847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:34,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:34,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:34,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973593995] [2021-06-12 19:44:34,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:34,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:34,441 INFO L87 Difference]: Start difference. First operand 1991 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:34,559 INFO L93 Difference]: Finished difference Result 2098 states and 6296 transitions. [2021-06-12 19:44:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:34,559 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:34,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:34,562 INFO L225 Difference]: With dead ends: 2098 [2021-06-12 19:44:34,562 INFO L226 Difference]: Without dead ends: 2086 [2021-06-12 19:44:34,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:44:34,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-12 19:44:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1993. [2021-06-12 19:44:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 3.0607429718875503) internal successors, (6097), 1992 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 6097 transitions. [2021-06-12 19:44:34,582 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 6097 transitions. Word has length 21 [2021-06-12 19:44:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:34,582 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 6097 transitions. [2021-06-12 19:44:34,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 6097 transitions. [2021-06-12 19:44:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:34,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:34,584 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:34,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39613 [2021-06-12 19:44:34,784 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:34,785 INFO L82 PathProgramCache]: Analyzing trace with hash 649187736, now seen corresponding path program 307 times [2021-06-12 19:44:34,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:34,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863069641] [2021-06-12 19:44:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:34,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863069641] [2021-06-12 19:44:34,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863069641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467404678] [2021-06-12 19:44:34,834 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 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 [2021-06-12 19:44:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:34,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:34,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467404678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:34,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:34,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:34,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954217139] [2021-06-12 19:44:34,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:34,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:34,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:34,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:34,892 INFO L87 Difference]: Start difference. First operand 1993 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:34,994 INFO L93 Difference]: Finished difference Result 2545 states and 7306 transitions. [2021-06-12 19:44:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:44:34,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:34,996 INFO L225 Difference]: With dead ends: 2545 [2021-06-12 19:44:34,996 INFO L226 Difference]: Without dead ends: 2545 [2021-06-12 19:44:34,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:44:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-06-12 19:44:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1996. [2021-06-12 19:44:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0606516290726815) internal successors, (6106), 1995 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6106 transitions. [2021-06-12 19:44:35,020 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6106 transitions. Word has length 21 [2021-06-12 19:44:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:35,020 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6106 transitions. [2021-06-12 19:44:35,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6106 transitions. [2021-06-12 19:44:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:35,022 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:35,022 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:35,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39614 [2021-06-12 19:44:35,223 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:35,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:35,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1454406011, now seen corresponding path program 308 times [2021-06-12 19:44:35,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:35,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841972285] [2021-06-12 19:44:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:35,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:35,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841972285] [2021-06-12 19:44:35,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841972285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:35,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639402824] [2021-06-12 19:44:35,260 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 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 [2021-06-12 19:44:35,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:35,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:35,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:35,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:35,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639402824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:35,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:35,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:44:35,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640889206] [2021-06-12 19:44:35,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:44:35,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:44:35,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:44:35,316 INFO L87 Difference]: Start difference. First operand 1996 states and 6106 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:35,377 INFO L93 Difference]: Finished difference Result 2246 states and 6593 transitions. [2021-06-12 19:44:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:44:35,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-06-12 19:44:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:35,379 INFO L225 Difference]: With dead ends: 2246 [2021-06-12 19:44:35,379 INFO L226 Difference]: Without dead ends: 2244 [2021-06-12 19:44:35,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:35,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-12 19:44:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2004. [2021-06-12 19:44:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.050424363454818) internal successors, (6110), 2003 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6110 transitions. [2021-06-12 19:44:35,400 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6110 transitions. Word has length 21 [2021-06-12 19:44:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:35,400 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6110 transitions. [2021-06-12 19:44:35,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6110 transitions. [2021-06-12 19:44:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:35,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:35,402 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:35,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39615 [2021-06-12 19:44:35,603 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:35,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:35,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1535536296, now seen corresponding path program 309 times [2021-06-12 19:44:35,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:35,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671250057] [2021-06-12 19:44:35,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:35,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:35,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671250057] [2021-06-12 19:44:35,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671250057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:35,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126422211] [2021-06-12 19:44:35,646 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 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 [2021-06-12 19:44:35,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:44:35,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:35,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:35,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126422211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:35,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:35,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:44:35,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824959642] [2021-06-12 19:44:35,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:44:35,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:35,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:44:35,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:44:35,707 INFO L87 Difference]: Start difference. First operand 2004 states and 6110 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:35,815 INFO L93 Difference]: Finished difference Result 2256 states and 6538 transitions. [2021-06-12 19:44:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:44:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-06-12 19:44:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:35,817 INFO L225 Difference]: With dead ends: 2256 [2021-06-12 19:44:35,817 INFO L226 Difference]: Without dead ends: 2254 [2021-06-12 19:44:35,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:44:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-12 19:44:35,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2016. [2021-06-12 19:44:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.04863523573201) internal successors, (6143), 2015 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6143 transitions. [2021-06-12 19:44:35,839 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6143 transitions. Word has length 21 [2021-06-12 19:44:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:35,839 INFO L482 AbstractCegarLoop]: Abstraction has 2016 states and 6143 transitions. [2021-06-12 19:44:35,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6143 transitions. [2021-06-12 19:44:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:35,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:35,841 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:36,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39616,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:36,041 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:36,041 INFO L82 PathProgramCache]: Analyzing trace with hash 327009918, now seen corresponding path program 310 times [2021-06-12 19:44:36,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:36,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361483901] [2021-06-12 19:44:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:36,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:36,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361483901] [2021-06-12 19:44:36,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361483901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:36,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778492540] [2021-06-12 19:44:36,088 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 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 [2021-06-12 19:44:36,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:36,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:36,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:36,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:36,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778492540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:36,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:36,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:36,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320633427] [2021-06-12 19:44:36,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:36,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:36,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:36,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:36,145 INFO L87 Difference]: Start difference. First operand 2016 states and 6143 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:36,215 INFO L93 Difference]: Finished difference Result 2369 states and 6830 transitions. [2021-06-12 19:44:36,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:44:36,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-12 19:44:36,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:36,218 INFO L225 Difference]: With dead ends: 2369 [2021-06-12 19:44:36,218 INFO L226 Difference]: Without dead ends: 2369 [2021-06-12 19:44:36,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-12 19:44:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2015. [2021-06-12 19:44:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.048162859980139) internal successors, (6139), 2014 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6139 transitions. [2021-06-12 19:44:36,240 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6139 transitions. Word has length 21 [2021-06-12 19:44:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:36,240 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6139 transitions. [2021-06-12 19:44:36,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6139 transitions. [2021-06-12 19:44:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:36,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:36,241 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:36,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39617 [2021-06-12 19:44:36,442 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1275555135, now seen corresponding path program 311 times [2021-06-12 19:44:36,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:36,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270842416] [2021-06-12 19:44:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:36,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:36,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270842416] [2021-06-12 19:44:36,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270842416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:36,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739583696] [2021-06-12 19:44:36,490 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 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 [2021-06-12 19:44:36,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:44:36,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:36,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:36,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739583696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:36,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:36,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:36,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597775806] [2021-06-12 19:44:36,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:36,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:36,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:36,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:36,544 INFO L87 Difference]: Start difference. First operand 2015 states and 6139 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:36,662 INFO L93 Difference]: Finished difference Result 2175 states and 6426 transitions. [2021-06-12 19:44:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:36,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:36,664 INFO L225 Difference]: With dead ends: 2175 [2021-06-12 19:44:36,665 INFO L226 Difference]: Without dead ends: 2157 [2021-06-12 19:44:36,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:44:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-06-12 19:44:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1987. [2021-06-12 19:44:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.0463242698892246) internal successors, (6050), 1986 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 6050 transitions. [2021-06-12 19:44:36,687 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 6050 transitions. Word has length 21 [2021-06-12 19:44:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:36,687 INFO L482 AbstractCegarLoop]: Abstraction has 1987 states and 6050 transitions. [2021-06-12 19:44:36,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 6050 transitions. [2021-06-12 19:44:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:36,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:36,689 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:36,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39618 [2021-06-12 19:44:36,889 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:36,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:36,890 INFO L82 PathProgramCache]: Analyzing trace with hash 864865496, now seen corresponding path program 312 times [2021-06-12 19:44:36,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:36,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585365269] [2021-06-12 19:44:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:36,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:36,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585365269] [2021-06-12 19:44:36,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585365269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:36,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169563731] [2021-06-12 19:44:36,937 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 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 [2021-06-12 19:44:36,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:44:36,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:36,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:36,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:37,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169563731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:37,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:37,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:37,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696601211] [2021-06-12 19:44:37,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:37,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:37,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:37,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:37,014 INFO L87 Difference]: Start difference. First operand 1987 states and 6050 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:37,108 INFO L93 Difference]: Finished difference Result 2488 states and 7125 transitions. [2021-06-12 19:44:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:44:37,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:37,110 INFO L225 Difference]: With dead ends: 2488 [2021-06-12 19:44:37,111 INFO L226 Difference]: Without dead ends: 2488 [2021-06-12 19:44:37,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:44:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-12 19:44:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1994. [2021-06-12 19:44:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.046161565479177) internal successors, (6071), 1993 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6071 transitions. [2021-06-12 19:44:37,132 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6071 transitions. Word has length 21 [2021-06-12 19:44:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:37,132 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6071 transitions. [2021-06-12 19:44:37,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6071 transitions. [2021-06-12 19:44:37,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:37,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:37,133 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:37,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39619,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:37,334 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:37,334 INFO L82 PathProgramCache]: Analyzing trace with hash 223475963, now seen corresponding path program 313 times [2021-06-12 19:44:37,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:37,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288121644] [2021-06-12 19:44:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:37,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:37,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288121644] [2021-06-12 19:44:37,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288121644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:37,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178642603] [2021-06-12 19:44:37,386 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 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 [2021-06-12 19:44:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:37,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178642603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:37,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:37,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:37,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084053372] [2021-06-12 19:44:37,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:37,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:37,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:37,444 INFO L87 Difference]: Start difference. First operand 1994 states and 6071 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:37,581 INFO L93 Difference]: Finished difference Result 2166 states and 6392 transitions. [2021-06-12 19:44:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:44:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:37,584 INFO L225 Difference]: With dead ends: 2166 [2021-06-12 19:44:37,584 INFO L226 Difference]: Without dead ends: 2158 [2021-06-12 19:44:37,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-06-12 19:44:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2000. [2021-06-12 19:44:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.0400200100050023) internal successors, (6077), 1999 states have internal predecessors, (6077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 6077 transitions. [2021-06-12 19:44:37,604 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 6077 transitions. Word has length 21 [2021-06-12 19:44:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:37,604 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 6077 transitions. [2021-06-12 19:44:37,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 6077 transitions. [2021-06-12 19:44:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:37,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:37,606 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:37,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39620,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:37,806 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 358519230, now seen corresponding path program 314 times [2021-06-12 19:44:37,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:37,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77384905] [2021-06-12 19:44:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:37,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:37,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77384905] [2021-06-12 19:44:37,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77384905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:37,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726427884] [2021-06-12 19:44:37,860 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 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 [2021-06-12 19:44:37,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:37,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:37,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726427884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:37,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:37,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:37,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468510758] [2021-06-12 19:44:37,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:37,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:37,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:37,921 INFO L87 Difference]: Start difference. First operand 2000 states and 6077 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:38,067 INFO L93 Difference]: Finished difference Result 2684 states and 7629 transitions. [2021-06-12 19:44:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:44:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:38,070 INFO L225 Difference]: With dead ends: 2684 [2021-06-12 19:44:38,070 INFO L226 Difference]: Without dead ends: 2684 [2021-06-12 19:44:38,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-06-12 19:44:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1877. [2021-06-12 19:44:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.031449893390192) internal successors, (5687), 1876 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5687 transitions. [2021-06-12 19:44:38,093 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5687 transitions. Word has length 21 [2021-06-12 19:44:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:38,093 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 5687 transitions. [2021-06-12 19:44:38,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5687 transitions. [2021-06-12 19:44:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:38,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:38,094 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:38,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39621,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:38,295 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash -449518021, now seen corresponding path program 315 times [2021-06-12 19:44:38,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:38,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880712231] [2021-06-12 19:44:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:38,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:38,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880712231] [2021-06-12 19:44:38,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880712231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:38,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285853259] [2021-06-12 19:44:38,331 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 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 [2021-06-12 19:44:38,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:44:38,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:38,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:38,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:38,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285853259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:38,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:38,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:44:38,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012267278] [2021-06-12 19:44:38,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:44:38,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:38,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:44:38,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:44:38,390 INFO L87 Difference]: Start difference. First operand 1877 states and 5687 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:38,449 INFO L93 Difference]: Finished difference Result 2128 states and 6179 transitions. [2021-06-12 19:44:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:44:38,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-06-12 19:44:38,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:38,451 INFO L225 Difference]: With dead ends: 2128 [2021-06-12 19:44:38,451 INFO L226 Difference]: Without dead ends: 2126 [2021-06-12 19:44:38,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:38,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-12 19:44:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1878. [2021-06-12 19:44:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0261054874800215) internal successors, (5680), 1877 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5680 transitions. [2021-06-12 19:44:38,470 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5680 transitions. Word has length 21 [2021-06-12 19:44:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:38,470 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5680 transitions. [2021-06-12 19:44:38,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5680 transitions. [2021-06-12 19:44:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:38,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:38,472 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:38,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39622,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:38,687 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash -368387736, now seen corresponding path program 316 times [2021-06-12 19:44:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:38,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179801155] [2021-06-12 19:44:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:38,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:38,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179801155] [2021-06-12 19:44:38,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179801155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:38,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132986150] [2021-06-12 19:44:38,722 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 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 [2021-06-12 19:44:38,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:38,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:38,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:38,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:38,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132986150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:38,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:38,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:44:38,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093042883] [2021-06-12 19:44:38,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:44:38,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:44:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:44:38,794 INFO L87 Difference]: Start difference. First operand 1878 states and 5680 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:38,910 INFO L93 Difference]: Finished difference Result 2105 states and 6036 transitions. [2021-06-12 19:44:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:44:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-06-12 19:44:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:38,912 INFO L225 Difference]: With dead ends: 2105 [2021-06-12 19:44:38,912 INFO L226 Difference]: Without dead ends: 2103 [2021-06-12 19:44:38,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:44:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-06-12 19:44:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1878. [2021-06-12 19:44:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0218433670751197) internal successors, (5672), 1877 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5672 transitions. [2021-06-12 19:44:38,933 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5672 transitions. Word has length 21 [2021-06-12 19:44:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:38,933 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5672 transitions. [2021-06-12 19:44:38,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5672 transitions. [2021-06-12 19:44:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:38,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:38,934 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:39,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39623 [2021-06-12 19:44:39,150 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash -628368897, now seen corresponding path program 317 times [2021-06-12 19:44:39,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:39,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286999994] [2021-06-12 19:44:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:39,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:39,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286999994] [2021-06-12 19:44:39,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286999994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:39,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811726835] [2021-06-12 19:44:39,197 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 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 [2021-06-12 19:44:39,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:44:39,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:39,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:39,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811726835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:39,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:39,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:39,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501097036] [2021-06-12 19:44:39,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:39,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:39,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:39,253 INFO L87 Difference]: Start difference. First operand 1878 states and 5672 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:39,391 INFO L93 Difference]: Finished difference Result 2035 states and 5959 transitions. [2021-06-12 19:44:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:39,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:39,393 INFO L225 Difference]: With dead ends: 2035 [2021-06-12 19:44:39,394 INFO L226 Difference]: Without dead ends: 2021 [2021-06-12 19:44:39,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-12 19:44:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1848. [2021-06-12 19:44:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.0211153221440172) internal successors, (5580), 1847 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 5580 transitions. [2021-06-12 19:44:39,427 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 5580 transitions. Word has length 21 [2021-06-12 19:44:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:39,428 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 5580 transitions. [2021-06-12 19:44:39,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 5580 transitions. [2021-06-12 19:44:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:39,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:39,429 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:39,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39624 [2021-06-12 19:44:39,645 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:39,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1039058536, now seen corresponding path program 318 times [2021-06-12 19:44:39,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:39,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681722889] [2021-06-12 19:44:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:39,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:39,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681722889] [2021-06-12 19:44:39,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681722889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:39,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877642126] [2021-06-12 19:44:39,698 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 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 [2021-06-12 19:44:39,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:44:39,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:39,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:39,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:39,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877642126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:39,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:39,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:39,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180484006] [2021-06-12 19:44:39,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:39,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:39,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:39,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:39,755 INFO L87 Difference]: Start difference. First operand 1848 states and 5580 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:39,840 INFO L93 Difference]: Finished difference Result 2226 states and 6355 transitions. [2021-06-12 19:44:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:44:39,840 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:39,842 INFO L225 Difference]: With dead ends: 2226 [2021-06-12 19:44:39,842 INFO L226 Difference]: Without dead ends: 2226 [2021-06-12 19:44:39,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:44:39,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-12 19:44:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1837. [2021-06-12 19:44:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.017429193899782) internal successors, (5540), 1836 states have internal predecessors, (5540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5540 transitions. [2021-06-12 19:44:39,863 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5540 transitions. Word has length 21 [2021-06-12 19:44:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:39,863 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5540 transitions. [2021-06-12 19:44:39,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5540 transitions. [2021-06-12 19:44:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:39,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:39,864 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:40,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39625 [2021-06-12 19:44:40,080 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:40,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1680448069, now seen corresponding path program 319 times [2021-06-12 19:44:40,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:40,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182645437] [2021-06-12 19:44:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:40,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:40,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182645437] [2021-06-12 19:44:40,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182645437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:40,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935957788] [2021-06-12 19:44:40,131 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 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 [2021-06-12 19:44:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:40,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:40,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935957788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:40,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:40,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:40,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907529488] [2021-06-12 19:44:40,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:40,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:40,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:40,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:40,191 INFO L87 Difference]: Start difference. First operand 1837 states and 5540 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:40,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:40,325 INFO L93 Difference]: Finished difference Result 2036 states and 5912 transitions. [2021-06-12 19:44:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:40,327 INFO L225 Difference]: With dead ends: 2036 [2021-06-12 19:44:40,327 INFO L226 Difference]: Without dead ends: 2028 [2021-06-12 19:44:40,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:44:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-06-12 19:44:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1837. [2021-06-12 19:44:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.0152505446623095) internal successors, (5536), 1836 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5536 transitions. [2021-06-12 19:44:40,347 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5536 transitions. Word has length 21 [2021-06-12 19:44:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:40,347 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5536 transitions. [2021-06-12 19:44:40,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5536 transitions. [2021-06-12 19:44:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:40,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:40,349 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:40,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39626,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:40,550 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:40,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1545404802, now seen corresponding path program 320 times [2021-06-12 19:44:40,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:40,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378617174] [2021-06-12 19:44:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:40,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:40,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378617174] [2021-06-12 19:44:40,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378617174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:40,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949303653] [2021-06-12 19:44:40,596 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 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 [2021-06-12 19:44:40,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:40,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:40,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:40,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:40,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949303653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:40,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:40,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:40,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450713703] [2021-06-12 19:44:40,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:40,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:40,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:40,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:40,659 INFO L87 Difference]: Start difference. First operand 1837 states and 5536 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:40,784 INFO L93 Difference]: Finished difference Result 2364 states and 6697 transitions. [2021-06-12 19:44:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:44:40,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:40,786 INFO L225 Difference]: With dead ends: 2364 [2021-06-12 19:44:40,786 INFO L226 Difference]: Without dead ends: 2364 [2021-06-12 19:44:40,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:44:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-06-12 19:44:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1754. [2021-06-12 19:44:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.0119794637763833) internal successors, (5280), 1753 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5280 transitions. [2021-06-12 19:44:40,806 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5280 transitions. Word has length 21 [2021-06-12 19:44:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:40,806 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 5280 transitions. [2021-06-12 19:44:40,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5280 transitions. [2021-06-12 19:44:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:40,808 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:40,808 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:41,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39627 [2021-06-12 19:44:41,008 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash 64835967, now seen corresponding path program 321 times [2021-06-12 19:44:41,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:41,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837230652] [2021-06-12 19:44:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:41,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:41,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837230652] [2021-06-12 19:44:41,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837230652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:41,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081876056] [2021-06-12 19:44:41,063 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 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 [2021-06-12 19:44:41,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:44:41,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:41,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:41,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:41,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081876056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:41,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:41,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:41,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034524954] [2021-06-12 19:44:41,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:41,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:41,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:41,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:41,139 INFO L87 Difference]: Start difference. First operand 1754 states and 5280 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:41,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:41,268 INFO L93 Difference]: Finished difference Result 2020 states and 5847 transitions. [2021-06-12 19:44:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:44:41,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:41,270 INFO L225 Difference]: With dead ends: 2020 [2021-06-12 19:44:41,270 INFO L226 Difference]: Without dead ends: 2010 [2021-06-12 19:44:41,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:41,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-06-12 19:44:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1756. [2021-06-12 19:44:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 3.0091168091168092) internal successors, (5281), 1755 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5281 transitions. [2021-06-12 19:44:41,289 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5281 transitions. Word has length 21 [2021-06-12 19:44:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:41,289 INFO L482 AbstractCegarLoop]: Abstraction has 1756 states and 5281 transitions. [2021-06-12 19:44:41,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5281 transitions. [2021-06-12 19:44:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:41,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:41,291 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:41,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39628,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:41,507 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:41,508 INFO L82 PathProgramCache]: Analyzing trace with hash -62269864, now seen corresponding path program 322 times [2021-06-12 19:44:41,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:41,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860837232] [2021-06-12 19:44:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:41,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:41,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860837232] [2021-06-12 19:44:41,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860837232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:41,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571242778] [2021-06-12 19:44:41,573 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 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 [2021-06-12 19:44:41,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:41,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:41,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571242778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:41,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:41,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:41,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138378918] [2021-06-12 19:44:41,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:41,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:41,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:41,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:41,635 INFO L87 Difference]: Start difference. First operand 1756 states and 5281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:41,823 INFO L93 Difference]: Finished difference Result 3174 states and 9068 transitions. [2021-06-12 19:44:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:44:41,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:41,827 INFO L225 Difference]: With dead ends: 3174 [2021-06-12 19:44:41,827 INFO L226 Difference]: Without dead ends: 3174 [2021-06-12 19:44:41,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:44:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-12 19:44:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 1885. [2021-06-12 19:44:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.0031847133757963) internal successors, (5658), 1884 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5658 transitions. [2021-06-12 19:44:41,855 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5658 transitions. Word has length 21 [2021-06-12 19:44:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:41,855 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 5658 transitions. [2021-06-12 19:44:41,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5658 transitions. [2021-06-12 19:44:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:41,857 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:41,857 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:42,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39629 [2021-06-12 19:44:42,057 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:42,057 INFO L82 PathProgramCache]: Analyzing trace with hash 658379131, now seen corresponding path program 323 times [2021-06-12 19:44:42,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:42,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241885565] [2021-06-12 19:44:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:42,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241885565] [2021-06-12 19:44:42,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241885565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179570936] [2021-06-12 19:44:42,097 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 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 [2021-06-12 19:44:42,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:42,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:42,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:42,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:42,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179570936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:42,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:42,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:44:42,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544353821] [2021-06-12 19:44:42,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:44:42,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:44:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:44:42,155 INFO L87 Difference]: Start difference. First operand 1885 states and 5658 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:42,212 INFO L93 Difference]: Finished difference Result 2149 states and 6166 transitions. [2021-06-12 19:44:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:44:42,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-06-12 19:44:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:42,214 INFO L225 Difference]: With dead ends: 2149 [2021-06-12 19:44:42,214 INFO L226 Difference]: Without dead ends: 2147 [2021-06-12 19:44:42,214 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-06-12 19:44:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1876. [2021-06-12 19:44:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9994666666666667) internal successors, (5624), 1875 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5624 transitions. [2021-06-12 19:44:42,234 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5624 transitions. Word has length 21 [2021-06-12 19:44:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:42,234 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5624 transitions. [2021-06-12 19:44:42,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5624 transitions. [2021-06-12 19:44:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:42,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:42,235 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:42,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39630,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:42,436 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash 739509416, now seen corresponding path program 324 times [2021-06-12 19:44:42,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:42,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317870203] [2021-06-12 19:44:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:42,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317870203] [2021-06-12 19:44:42,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317870203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170264147] [2021-06-12 19:44:42,472 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 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 [2021-06-12 19:44:42,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:44:42,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:44:42,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170264147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:42,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:42,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:44:42,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297584105] [2021-06-12 19:44:42,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:44:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:44:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:44:42,533 INFO L87 Difference]: Start difference. First operand 1876 states and 5624 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:42,644 INFO L93 Difference]: Finished difference Result 2097 states and 6031 transitions. [2021-06-12 19:44:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:44:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-06-12 19:44:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:42,646 INFO L225 Difference]: With dead ends: 2097 [2021-06-12 19:44:42,646 INFO L226 Difference]: Without dead ends: 2095 [2021-06-12 19:44:42,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:44:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-12 19:44:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1899. [2021-06-12 19:44:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 3.0010537407797684) internal successors, (5696), 1898 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5696 transitions. [2021-06-12 19:44:42,669 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5696 transitions. Word has length 21 [2021-06-12 19:44:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:42,669 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5696 transitions. [2021-06-12 19:44:42,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5696 transitions. [2021-06-12 19:44:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:42,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:42,671 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:42,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39631,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:42,881 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:42,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:42,881 INFO L82 PathProgramCache]: Analyzing trace with hash 479528255, now seen corresponding path program 325 times [2021-06-12 19:44:42,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:42,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901714019] [2021-06-12 19:44:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:42,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:42,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901714019] [2021-06-12 19:44:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901714019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738079182] [2021-06-12 19:44:42,941 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 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 [2021-06-12 19:44:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:42,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:42,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:42,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738079182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:42,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:42,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:42,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636180529] [2021-06-12 19:44:42,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:42,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:42,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:42,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:42,992 INFO L87 Difference]: Start difference. First operand 1899 states and 5696 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:43,134 INFO L93 Difference]: Finished difference Result 2154 states and 6140 transitions. [2021-06-12 19:44:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:43,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:44:43,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:43,136 INFO L225 Difference]: With dead ends: 2154 [2021-06-12 19:44:43,136 INFO L226 Difference]: Without dead ends: 2136 [2021-06-12 19:44:43,136 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-12 19:44:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1861. [2021-06-12 19:44:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 2.9935483870967743) internal successors, (5568), 1860 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 5568 transitions. [2021-06-12 19:44:43,156 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 5568 transitions. Word has length 21 [2021-06-12 19:44:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:43,156 INFO L482 AbstractCegarLoop]: Abstraction has 1861 states and 5568 transitions. [2021-06-12 19:44:43,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:44:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 5568 transitions. [2021-06-12 19:44:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:43,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:43,158 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:43,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39632,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:43,358 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:43,358 INFO L82 PathProgramCache]: Analyzing trace with hash -572550917, now seen corresponding path program 326 times [2021-06-12 19:44:43,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:43,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210754598] [2021-06-12 19:44:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:43,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:43,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210754598] [2021-06-12 19:44:43,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210754598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:43,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196176869] [2021-06-12 19:44:43,411 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 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 [2021-06-12 19:44:43,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:43,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:43,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:43,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:43,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196176869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:43,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:43,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:43,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790521092] [2021-06-12 19:44:43,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:43,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:43,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:43,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:43,469 INFO L87 Difference]: Start difference. First operand 1861 states and 5568 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:43,636 INFO L93 Difference]: Finished difference Result 2057 states and 5928 transitions. [2021-06-12 19:44:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:43,639 INFO L225 Difference]: With dead ends: 2057 [2021-06-12 19:44:43,639 INFO L226 Difference]: Without dead ends: 2041 [2021-06-12 19:44:43,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-12 19:44:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1865. [2021-06-12 19:44:43,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.984978540772532) internal successors, (5564), 1864 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5564 transitions. [2021-06-12 19:44:43,658 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5564 transitions. Word has length 21 [2021-06-12 19:44:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:43,658 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5564 transitions. [2021-06-12 19:44:43,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5564 transitions. [2021-06-12 19:44:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:43,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:43,660 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:43,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39633,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:43,861 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash -437507650, now seen corresponding path program 327 times [2021-06-12 19:44:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:43,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908280044] [2021-06-12 19:44:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:43,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:43,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908280044] [2021-06-12 19:44:43,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908280044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:43,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833376083] [2021-06-12 19:44:43,909 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 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 [2021-06-12 19:44:43,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:44:43,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:43,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:43,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833376083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:43,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:43,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:43,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589242286] [2021-06-12 19:44:43,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:43,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:43,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:43,966 INFO L87 Difference]: Start difference. First operand 1865 states and 5564 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:44,068 INFO L93 Difference]: Finished difference Result 2235 states and 6339 transitions. [2021-06-12 19:44:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:44:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:44,070 INFO L225 Difference]: With dead ends: 2235 [2021-06-12 19:44:44,070 INFO L226 Difference]: Without dead ends: 2235 [2021-06-12 19:44:44,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:44:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-06-12 19:44:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1818. [2021-06-12 19:44:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.977435332966428) internal successors, (5410), 1817 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5410 transitions. [2021-06-12 19:44:44,089 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5410 transitions. Word has length 21 [2021-06-12 19:44:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:44,089 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5410 transitions. [2021-06-12 19:44:44,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5410 transitions. [2021-06-12 19:44:44,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:44,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:44,091 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:44,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39634,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:44,291 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1172733119, now seen corresponding path program 328 times [2021-06-12 19:44:44,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:44,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842467288] [2021-06-12 19:44:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:44,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:44,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842467288] [2021-06-12 19:44:44,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842467288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:44,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050875150] [2021-06-12 19:44:44,347 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 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 [2021-06-12 19:44:44,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:44,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:44,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:44,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:44,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050875150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:44,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:44,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:44,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274293754] [2021-06-12 19:44:44,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:44,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:44,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:44,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:44,406 INFO L87 Difference]: Start difference. First operand 1818 states and 5410 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:44,533 INFO L93 Difference]: Finished difference Result 2108 states and 6025 transitions. [2021-06-12 19:44:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:44,535 INFO L225 Difference]: With dead ends: 2108 [2021-06-12 19:44:44,535 INFO L226 Difference]: Without dead ends: 2098 [2021-06-12 19:44:44,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:44:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-12 19:44:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1818. [2021-06-12 19:44:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.976884975233902) internal successors, (5409), 1817 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5409 transitions. [2021-06-12 19:44:44,554 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5409 transitions. Word has length 21 [2021-06-12 19:44:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:44,554 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5409 transitions. [2021-06-12 19:44:44,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5409 transitions. [2021-06-12 19:44:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:44,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:44,555 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:44,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39635 [2021-06-12 19:44:44,756 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:44,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1045627288, now seen corresponding path program 329 times [2021-06-12 19:44:44,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:44,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301935264] [2021-06-12 19:44:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:44,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:44,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301935264] [2021-06-12 19:44:44,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301935264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:44,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325375624] [2021-06-12 19:44:44,806 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 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 [2021-06-12 19:44:44,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:44:44,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:44,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:44,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325375624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:44,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:44,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:44,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015421704] [2021-06-12 19:44:44,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:44,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:44,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:44,862 INFO L87 Difference]: Start difference. First operand 1818 states and 5409 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:45,018 INFO L93 Difference]: Finished difference Result 3306 states and 9499 transitions. [2021-06-12 19:44:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:44:45,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:45,021 INFO L225 Difference]: With dead ends: 3306 [2021-06-12 19:44:45,021 INFO L226 Difference]: Without dead ends: 3306 [2021-06-12 19:44:45,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:44:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-12 19:44:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 1865. [2021-06-12 19:44:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.962982832618026) internal successors, (5523), 1864 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5523 transitions. [2021-06-12 19:44:45,045 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5523 transitions. Word has length 21 [2021-06-12 19:44:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:45,045 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5523 transitions. [2021-06-12 19:44:45,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5523 transitions. [2021-06-12 19:44:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:45,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:45,046 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:45,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39636 [2021-06-12 19:44:45,247 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash -558036613, now seen corresponding path program 330 times [2021-06-12 19:44:45,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:45,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268909453] [2021-06-12 19:44:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:45,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:45,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268909453] [2021-06-12 19:44:45,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268909453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:45,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836347080] [2021-06-12 19:44:45,307 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 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 [2021-06-12 19:44:45,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:44:45,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:45,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836347080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:45,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:45,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:45,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042560386] [2021-06-12 19:44:45,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:45,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:45,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:45,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:45,361 INFO L87 Difference]: Start difference. First operand 1865 states and 5523 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:45,475 INFO L93 Difference]: Finished difference Result 2163 states and 6155 transitions. [2021-06-12 19:44:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:45,478 INFO L225 Difference]: With dead ends: 2163 [2021-06-12 19:44:45,478 INFO L226 Difference]: Without dead ends: 2151 [2021-06-12 19:44:45,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:44:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-12 19:44:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1867. [2021-06-12 19:44:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9608788853161845) internal successors, (5525), 1866 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5525 transitions. [2021-06-12 19:44:45,500 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5525 transitions. Word has length 21 [2021-06-12 19:44:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:45,500 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 5525 transitions. [2021-06-12 19:44:45,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5525 transitions. [2021-06-12 19:44:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:45,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:45,502 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:45,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39637 [2021-06-12 19:44:45,702 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash -221829890, now seen corresponding path program 331 times [2021-06-12 19:44:45,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:45,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895963718] [2021-06-12 19:44:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:45,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:45,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895963718] [2021-06-12 19:44:45,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895963718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:45,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384556324] [2021-06-12 19:44:45,756 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 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 [2021-06-12 19:44:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:45,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:45,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384556324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:45,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:45,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:45,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690456214] [2021-06-12 19:44:45,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:45,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:45,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:45,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:45,811 INFO L87 Difference]: Start difference. First operand 1867 states and 5525 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:46,019 INFO L93 Difference]: Finished difference Result 3350 states and 9497 transitions. [2021-06-12 19:44:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:44:46,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:46,023 INFO L225 Difference]: With dead ends: 3350 [2021-06-12 19:44:46,023 INFO L226 Difference]: Without dead ends: 3350 [2021-06-12 19:44:46,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:44:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-06-12 19:44:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1964. [2021-06-12 19:44:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 2.957717778909832) internal successors, (5806), 1963 states have internal predecessors, (5806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 5806 transitions. [2021-06-12 19:44:46,048 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 5806 transitions. Word has length 21 [2021-06-12 19:44:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:46,048 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 5806 transitions. [2021-06-12 19:44:46,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 5806 transitions. [2021-06-12 19:44:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:46,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:46,049 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:46,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39638 [2021-06-12 19:44:46,250 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:46,250 INFO L82 PathProgramCache]: Analyzing trace with hash 496894629, now seen corresponding path program 332 times [2021-06-12 19:44:46,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:46,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315719434] [2021-06-12 19:44:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:46,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:46,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315719434] [2021-06-12 19:44:46,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315719434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:46,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61279012] [2021-06-12 19:44:46,293 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 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 [2021-06-12 19:44:46,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:46,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:46,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:46,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61279012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:46,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:46,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:46,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415289183] [2021-06-12 19:44:46,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:46,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:46,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:46,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:46,352 INFO L87 Difference]: Start difference. First operand 1964 states and 5806 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:44:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:46,430 INFO L93 Difference]: Finished difference Result 2106 states and 6084 transitions. [2021-06-12 19:44:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:44:46,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21 [2021-06-12 19:44:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:46,432 INFO L225 Difference]: With dead ends: 2106 [2021-06-12 19:44:46,432 INFO L226 Difference]: Without dead ends: 2106 [2021-06-12 19:44:46,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:44:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-12 19:44:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1970. [2021-06-12 19:44:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.957846622651092) internal successors, (5824), 1969 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5824 transitions. [2021-06-12 19:44:46,453 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5824 transitions. Word has length 21 [2021-06-12 19:44:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:46,453 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5824 transitions. [2021-06-12 19:44:46,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:44:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5824 transitions. [2021-06-12 19:44:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:46,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:46,454 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:46,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39639 [2021-06-12 19:44:46,655 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:46,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:46,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1283033832, now seen corresponding path program 333 times [2021-06-12 19:44:46,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:46,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699533551] [2021-06-12 19:44:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:46,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:46,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699533551] [2021-06-12 19:44:46,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699533551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:46,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522363933] [2021-06-12 19:44:46,700 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 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 [2021-06-12 19:44:46,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:44:46,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:46,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:46,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522363933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:46,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:46,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:46,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030944871] [2021-06-12 19:44:46,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:46,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:46,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:46,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:46,754 INFO L87 Difference]: Start difference. First operand 1970 states and 5824 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:44:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:46,914 INFO L93 Difference]: Finished difference Result 2190 states and 6175 transitions. [2021-06-12 19:44:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21 [2021-06-12 19:44:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:46,916 INFO L225 Difference]: With dead ends: 2190 [2021-06-12 19:44:46,916 INFO L226 Difference]: Without dead ends: 2186 [2021-06-12 19:44:46,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-06-12 19:44:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1970. [2021-06-12 19:44:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.95733875063484) internal successors, (5823), 1969 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5823 transitions. [2021-06-12 19:44:46,936 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5823 transitions. Word has length 21 [2021-06-12 19:44:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:46,936 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5823 transitions. [2021-06-12 19:44:46,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-06-12 19:44:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5823 transitions. [2021-06-12 19:44:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:46,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:46,938 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:47,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39640,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:47,138 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:47,139 INFO L82 PathProgramCache]: Analyzing trace with hash 49909311, now seen corresponding path program 334 times [2021-06-12 19:44:47,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:47,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120416931] [2021-06-12 19:44:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:47,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:47,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120416931] [2021-06-12 19:44:47,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120416931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:47,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717535288] [2021-06-12 19:44:47,195 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 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 [2021-06-12 19:44:47,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:47,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:47,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:47,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:47,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717535288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:47,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:47,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:47,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406875116] [2021-06-12 19:44:47,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:47,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:47,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:47,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:47,252 INFO L87 Difference]: Start difference. First operand 1970 states and 5823 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:47,337 INFO L93 Difference]: Finished difference Result 2213 states and 6351 transitions. [2021-06-12 19:44:47,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:44:47,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-12 19:44:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:47,340 INFO L225 Difference]: With dead ends: 2213 [2021-06-12 19:44:47,340 INFO L226 Difference]: Without dead ends: 2193 [2021-06-12 19:44:47,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:44:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-06-12 19:44:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1970. [2021-06-12 19:44:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.9563230066023363) internal successors, (5821), 1969 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5821 transitions. [2021-06-12 19:44:47,361 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5821 transitions. Word has length 21 [2021-06-12 19:44:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:47,361 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5821 transitions. [2021-06-12 19:44:47,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5821 transitions. [2021-06-12 19:44:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:47,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:47,362 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:47,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39641,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:47,569 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash -77196520, now seen corresponding path program 335 times [2021-06-12 19:44:47,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:47,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990482869] [2021-06-12 19:44:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:47,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990482869] [2021-06-12 19:44:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990482869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700282966] [2021-06-12 19:44:47,616 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 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 [2021-06-12 19:44:47,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:44:47,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:47,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:47,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700282966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:47,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:47,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:47,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129749166] [2021-06-12 19:44:47,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:47,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:47,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:47,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:47,680 INFO L87 Difference]: Start difference. First operand 1970 states and 5821 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:47,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:47,855 INFO L93 Difference]: Finished difference Result 2787 states and 7905 transitions. [2021-06-12 19:44:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:47,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-12 19:44:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:47,858 INFO L225 Difference]: With dead ends: 2787 [2021-06-12 19:44:47,858 INFO L226 Difference]: Without dead ends: 2787 [2021-06-12 19:44:47,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:44:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-12 19:44:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2121. [2021-06-12 19:44:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9627358490566036) internal successors, (6281), 2120 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6281 transitions. [2021-06-12 19:44:47,883 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6281 transitions. Word has length 21 [2021-06-12 19:44:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:47,883 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6281 transitions. [2021-06-12 19:44:47,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6281 transitions. [2021-06-12 19:44:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:47,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:47,885 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:48,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39642,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:48,085 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash -586557543, now seen corresponding path program 336 times [2021-06-12 19:44:48,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:48,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662639248] [2021-06-12 19:44:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:48,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662639248] [2021-06-12 19:44:48,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662639248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396365046] [2021-06-12 19:44:48,139 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 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 [2021-06-12 19:44:48,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:44:48,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:48,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:48,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396365046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:48,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:48,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:48,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632704147] [2021-06-12 19:44:48,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:48,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:48,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:48,193 INFO L87 Difference]: Start difference. First operand 2121 states and 6281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:48,335 INFO L93 Difference]: Finished difference Result 2439 states and 6992 transitions. [2021-06-12 19:44:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:48,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:48,338 INFO L225 Difference]: With dead ends: 2439 [2021-06-12 19:44:48,338 INFO L226 Difference]: Without dead ends: 2419 [2021-06-12 19:44:48,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:44:48,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-06-12 19:44:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2121. [2021-06-12 19:44:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9584905660377356) internal successors, (6272), 2120 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6272 transitions. [2021-06-12 19:44:48,362 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6272 transitions. Word has length 21 [2021-06-12 19:44:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:48,362 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6272 transitions. [2021-06-12 19:44:48,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6272 transitions. [2021-06-12 19:44:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:48,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:48,364 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:48,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39643 [2021-06-12 19:44:48,564 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash -713663374, now seen corresponding path program 337 times [2021-06-12 19:44:48,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:48,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695779513] [2021-06-12 19:44:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:48,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:48,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695779513] [2021-06-12 19:44:48,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695779513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:48,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816471983] [2021-06-12 19:44:48,623 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 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 [2021-06-12 19:44:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:48,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:48,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816471983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:48,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:48,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:48,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207124940] [2021-06-12 19:44:48,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:48,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:48,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:48,679 INFO L87 Difference]: Start difference. First operand 2121 states and 6272 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:48,831 INFO L93 Difference]: Finished difference Result 2730 states and 7756 transitions. [2021-06-12 19:44:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:44:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:48,834 INFO L225 Difference]: With dead ends: 2730 [2021-06-12 19:44:48,834 INFO L226 Difference]: Without dead ends: 2730 [2021-06-12 19:44:48,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:44:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-06-12 19:44:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1965. [2021-06-12 19:44:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 2.969959266802444) internal successors, (5833), 1964 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 5833 transitions. [2021-06-12 19:44:48,858 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 5833 transitions. Word has length 21 [2021-06-12 19:44:48,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:48,858 INFO L482 AbstractCegarLoop]: Abstraction has 1965 states and 5833 transitions. [2021-06-12 19:44:48,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 5833 transitions. [2021-06-12 19:44:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:48,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:48,860 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:49,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39644,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:49,060 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:49,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1977640021, now seen corresponding path program 338 times [2021-06-12 19:44:49,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:49,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114581502] [2021-06-12 19:44:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:49,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:49,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114581502] [2021-06-12 19:44:49,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114581502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:49,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263244250] [2021-06-12 19:44:49,116 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 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 [2021-06-12 19:44:49,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:49,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:49,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:49,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:49,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263244250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:49,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:49,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:49,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8948650] [2021-06-12 19:44:49,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:49,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:49,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:49,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:49,168 INFO L87 Difference]: Start difference. First operand 1965 states and 5833 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:49,265 INFO L93 Difference]: Finished difference Result 2345 states and 6666 transitions. [2021-06-12 19:44:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:49,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:49,268 INFO L225 Difference]: With dead ends: 2345 [2021-06-12 19:44:49,268 INFO L226 Difference]: Without dead ends: 2333 [2021-06-12 19:44:49,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:44:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-12 19:44:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1974. [2021-06-12 19:44:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.964521033958439) internal successors, (5849), 1973 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5849 transitions. [2021-06-12 19:44:49,288 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5849 transitions. Word has length 21 [2021-06-12 19:44:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:49,288 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 5849 transitions. [2021-06-12 19:44:49,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5849 transitions. [2021-06-12 19:44:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:49,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:49,290 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:49,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39645 [2021-06-12 19:44:49,490 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:49,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1981120552, now seen corresponding path program 339 times [2021-06-12 19:44:49,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:49,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625095757] [2021-06-12 19:44:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:49,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:49,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625095757] [2021-06-12 19:44:49,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625095757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:49,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020730512] [2021-06-12 19:44:49,572 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 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 [2021-06-12 19:44:49,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:44:49,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:49,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:49,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020730512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:49,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:49,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:49,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607630798] [2021-06-12 19:44:49,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:49,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:49,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:49,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:49,629 INFO L87 Difference]: Start difference. First operand 1974 states and 5849 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:49,841 INFO L93 Difference]: Finished difference Result 3098 states and 8778 transitions. [2021-06-12 19:44:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:44:49,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:49,844 INFO L225 Difference]: With dead ends: 3098 [2021-06-12 19:44:49,844 INFO L226 Difference]: Without dead ends: 3098 [2021-06-12 19:44:49,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:44:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-06-12 19:44:49,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 1904. [2021-06-12 19:44:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.9600630583289544) internal successors, (5633), 1903 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5633 transitions. [2021-06-12 19:44:49,869 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5633 transitions. Word has length 21 [2021-06-12 19:44:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:49,869 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 5633 transitions. [2021-06-12 19:44:49,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5633 transitions. [2021-06-12 19:44:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:49,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:49,870 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:50,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39646,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:50,071 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:50,071 INFO L82 PathProgramCache]: Analyzing trace with hash 643452475, now seen corresponding path program 340 times [2021-06-12 19:44:50,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:50,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089709505] [2021-06-12 19:44:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:50,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:50,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089709505] [2021-06-12 19:44:50,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089709505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:50,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510114747] [2021-06-12 19:44:50,108 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 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 [2021-06-12 19:44:50,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:50,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:50,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:50,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:50,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510114747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:50,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:50,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:44:50,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016304122] [2021-06-12 19:44:50,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:44:50,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:50,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:44:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:44:50,164 INFO L87 Difference]: Start difference. First operand 1904 states and 5633 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:50,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:50,228 INFO L93 Difference]: Finished difference Result 2228 states and 6256 transitions. [2021-06-12 19:44:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:44:50,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-06-12 19:44:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:50,230 INFO L225 Difference]: With dead ends: 2228 [2021-06-12 19:44:50,230 INFO L226 Difference]: Without dead ends: 2228 [2021-06-12 19:44:50,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-12 19:44:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1928. [2021-06-12 19:44:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.9709392838609237) internal successors, (5725), 1927 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 5725 transitions. [2021-06-12 19:44:50,249 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 5725 transitions. Word has length 21 [2021-06-12 19:44:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:50,249 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 5725 transitions. [2021-06-12 19:44:50,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 5725 transitions. [2021-06-12 19:44:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:50,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:50,251 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:50,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39647 [2021-06-12 19:44:50,452 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:50,452 INFO L82 PathProgramCache]: Analyzing trace with hash 724582760, now seen corresponding path program 341 times [2021-06-12 19:44:50,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:50,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496148236] [2021-06-12 19:44:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:50,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:50,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496148236] [2021-06-12 19:44:50,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496148236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:50,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139766689] [2021-06-12 19:44:50,488 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 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 [2021-06-12 19:44:50,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:44:50,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:50,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:44:50,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139766689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:50,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:50,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:44:50,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520995696] [2021-06-12 19:44:50,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:44:50,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:50,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:44:50,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:44:50,552 INFO L87 Difference]: Start difference. First operand 1928 states and 5725 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:50,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:50,668 INFO L93 Difference]: Finished difference Result 2105 states and 6019 transitions. [2021-06-12 19:44:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:44:50,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-06-12 19:44:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:50,671 INFO L225 Difference]: With dead ends: 2105 [2021-06-12 19:44:50,671 INFO L226 Difference]: Without dead ends: 2103 [2021-06-12 19:44:50,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:44:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-06-12 19:44:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1939. [2021-06-12 19:44:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9726522187822497) internal successors, (5761), 1938 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5761 transitions. [2021-06-12 19:44:50,693 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5761 transitions. Word has length 21 [2021-06-12 19:44:50,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:50,693 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5761 transitions. [2021-06-12 19:44:50,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-06-12 19:44:50,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5761 transitions. [2021-06-12 19:44:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:50,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:50,695 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:50,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39648 [2021-06-12 19:44:50,896 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash -587477573, now seen corresponding path program 342 times [2021-06-12 19:44:50,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:50,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691781108] [2021-06-12 19:44:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:50,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:50,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691781108] [2021-06-12 19:44:50,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691781108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:50,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980462609] [2021-06-12 19:44:50,954 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 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 [2021-06-12 19:44:50,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:44:50,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:50,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:51,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980462609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:51,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:51,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:44:51,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508717713] [2021-06-12 19:44:51,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:51,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:51,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:51,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:51,012 INFO L87 Difference]: Start difference. First operand 1939 states and 5761 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:51,159 INFO L93 Difference]: Finished difference Result 2242 states and 6291 transitions. [2021-06-12 19:44:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:51,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:51,162 INFO L225 Difference]: With dead ends: 2242 [2021-06-12 19:44:51,162 INFO L226 Difference]: Without dead ends: 2212 [2021-06-12 19:44:51,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:51,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-12 19:44:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1939. [2021-06-12 19:44:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9623323013415894) internal successors, (5741), 1938 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5741 transitions. [2021-06-12 19:44:51,182 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5741 transitions. Word has length 21 [2021-06-12 19:44:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:51,182 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5741 transitions. [2021-06-12 19:44:51,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5741 transitions. [2021-06-12 19:44:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:51,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:51,184 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:51,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39649 [2021-06-12 19:44:51,384 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:51,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:51,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1157806463, now seen corresponding path program 343 times [2021-06-12 19:44:51,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:51,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108573175] [2021-06-12 19:44:51,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:51,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:51,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108573175] [2021-06-12 19:44:51,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108573175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:51,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147298070] [2021-06-12 19:44:51,440 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 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 [2021-06-12 19:44:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:51,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147298070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:51,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:51,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:51,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355817235] [2021-06-12 19:44:51,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:51,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:51,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:51,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:51,499 INFO L87 Difference]: Start difference. First operand 1939 states and 5741 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:51,672 INFO L93 Difference]: Finished difference Result 2170 states and 6162 transitions. [2021-06-12 19:44:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:44:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:51,674 INFO L225 Difference]: With dead ends: 2170 [2021-06-12 19:44:51,675 INFO L226 Difference]: Without dead ends: 2150 [2021-06-12 19:44:51,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:44:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-12 19:44:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1941. [2021-06-12 19:44:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.956701030927835) internal successors, (5736), 1940 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5736 transitions. [2021-06-12 19:44:51,695 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5736 transitions. Word has length 21 [2021-06-12 19:44:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:51,695 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5736 transitions. [2021-06-12 19:44:51,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5736 transitions. [2021-06-12 19:44:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:51,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:51,697 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:51,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39650,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:51,914 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:51,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:51,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1030700632, now seen corresponding path program 344 times [2021-06-12 19:44:51,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:51,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551610584] [2021-06-12 19:44:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:51,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:51,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551610584] [2021-06-12 19:44:51,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551610584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:51,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081719244] [2021-06-12 19:44:51,985 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 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 [2021-06-12 19:44:52,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:52,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:52,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:52,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:52,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081719244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:52,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:52,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340885695] [2021-06-12 19:44:52,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:52,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:52,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:52,046 INFO L87 Difference]: Start difference. First operand 1941 states and 5736 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:52,167 INFO L93 Difference]: Finished difference Result 2262 states and 6373 transitions. [2021-06-12 19:44:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:44:52,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:52,170 INFO L225 Difference]: With dead ends: 2262 [2021-06-12 19:44:52,170 INFO L226 Difference]: Without dead ends: 2262 [2021-06-12 19:44:52,170 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-12 19:44:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1442. [2021-06-12 19:44:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.8986814712005553) internal successors, (4177), 1441 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4177 transitions. [2021-06-12 19:44:52,185 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4177 transitions. Word has length 21 [2021-06-12 19:44:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:52,185 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4177 transitions. [2021-06-12 19:44:52,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4177 transitions. [2021-06-12 19:44:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:52,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:52,187 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:52,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39651,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:52,387 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:52,387 INFO L82 PathProgramCache]: Analyzing trace with hash -572963269, now seen corresponding path program 345 times [2021-06-12 19:44:52,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:52,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139619705] [2021-06-12 19:44:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:52,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:52,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139619705] [2021-06-12 19:44:52,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139619705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:52,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886411417] [2021-06-12 19:44:52,445 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 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 [2021-06-12 19:44:52,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:44:52,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:52,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:52,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:52,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886411417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:52,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:52,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:52,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108961990] [2021-06-12 19:44:52,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:52,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:52,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:52,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:52,508 INFO L87 Difference]: Start difference. First operand 1442 states and 4177 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:52,617 INFO L93 Difference]: Finished difference Result 1911 states and 5213 transitions. [2021-06-12 19:44:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:44:52,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:52,619 INFO L225 Difference]: With dead ends: 1911 [2021-06-12 19:44:52,619 INFO L226 Difference]: Without dead ends: 1899 [2021-06-12 19:44:52,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:44:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-12 19:44:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1444. [2021-06-12 19:44:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.898128898128898) internal successors, (4182), 1443 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4182 transitions. [2021-06-12 19:44:52,634 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4182 transitions. Word has length 21 [2021-06-12 19:44:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:52,634 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4182 transitions. [2021-06-12 19:44:52,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4182 transitions. [2021-06-12 19:44:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:52,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:52,635 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:52,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39652,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:52,836 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:52,836 INFO L82 PathProgramCache]: Analyzing trace with hash -236756546, now seen corresponding path program 346 times [2021-06-12 19:44:52,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:52,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397438233] [2021-06-12 19:44:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:52,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:52,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397438233] [2021-06-12 19:44:52,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397438233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:52,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409881546] [2021-06-12 19:44:52,906 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 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 [2021-06-12 19:44:52,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:52,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:52,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:52,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409881546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:52,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:52,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:52,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740958808] [2021-06-12 19:44:52,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:52,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:52,966 INFO L87 Difference]: Start difference. First operand 1444 states and 4182 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:53,146 INFO L93 Difference]: Finished difference Result 2375 states and 6555 transitions. [2021-06-12 19:44:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:44:53,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:53,148 INFO L225 Difference]: With dead ends: 2375 [2021-06-12 19:44:53,148 INFO L226 Difference]: Without dead ends: 2375 [2021-06-12 19:44:53,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:44:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-12 19:44:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1721. [2021-06-12 19:44:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 2.9209302325581397) internal successors, (5024), 1720 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5024 transitions. [2021-06-12 19:44:53,166 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5024 transitions. Word has length 21 [2021-06-12 19:44:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:53,166 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5024 transitions. [2021-06-12 19:44:53,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5024 transitions. [2021-06-12 19:44:53,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:53,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:53,168 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:53,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39653,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:53,369 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1607749887, now seen corresponding path program 347 times [2021-06-12 19:44:53,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:53,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210198744] [2021-06-12 19:44:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:53,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:53,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210198744] [2021-06-12 19:44:53,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210198744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:53,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730867114] [2021-06-12 19:44:53,431 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 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 [2021-06-12 19:44:53,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:53,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:53,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:53,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:53,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730867114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:53,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:53,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:53,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092678509] [2021-06-12 19:44:53,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:53,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:53,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:53,492 INFO L87 Difference]: Start difference. First operand 1721 states and 5024 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:53,600 INFO L93 Difference]: Finished difference Result 2189 states and 6061 transitions. [2021-06-12 19:44:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:53,602 INFO L225 Difference]: With dead ends: 2189 [2021-06-12 19:44:53,602 INFO L226 Difference]: Without dead ends: 2175 [2021-06-12 19:44:53,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:44:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-06-12 19:44:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1736. [2021-06-12 19:44:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.9129682997118156) internal successors, (5054), 1735 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5054 transitions. [2021-06-12 19:44:53,619 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5054 transitions. Word has length 21 [2021-06-12 19:44:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:53,620 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5054 transitions. [2021-06-12 19:44:53,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5054 transitions. [2021-06-12 19:44:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:53,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:53,621 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:53,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39654,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:53,821 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:53,822 INFO L82 PathProgramCache]: Analyzing trace with hash -873223400, now seen corresponding path program 348 times [2021-06-12 19:44:53,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:53,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760977482] [2021-06-12 19:44:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:53,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760977482] [2021-06-12 19:44:53,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760977482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45137022] [2021-06-12 19:44:53,880 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 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 [2021-06-12 19:44:53,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:44:53,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:53,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:53,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:53,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45137022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:53,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:53,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:53,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81181303] [2021-06-12 19:44:53,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:53,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:53,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:53,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:53,942 INFO L87 Difference]: Start difference. First operand 1736 states and 5054 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:54,194 INFO L93 Difference]: Finished difference Result 2910 states and 8090 transitions. [2021-06-12 19:44:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:44:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:54,197 INFO L225 Difference]: With dead ends: 2910 [2021-06-12 19:44:54,197 INFO L226 Difference]: Without dead ends: 2910 [2021-06-12 19:44:54,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:44:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-12 19:44:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2068. [2021-06-12 19:44:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.9225931301403) internal successors, (6041), 2067 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 6041 transitions. [2021-06-12 19:44:54,221 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 6041 transitions. Word has length 21 [2021-06-12 19:44:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:54,221 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 6041 transitions. [2021-06-12 19:44:54,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 6041 transitions. [2021-06-12 19:44:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:54,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:54,223 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:54,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39655,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:54,423 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:54,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1793458955, now seen corresponding path program 349 times [2021-06-12 19:44:54,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:54,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695867133] [2021-06-12 19:44:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:54,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:54,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695867133] [2021-06-12 19:44:54,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695867133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:54,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108959427] [2021-06-12 19:44:54,470 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 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 [2021-06-12 19:44:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:54,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:54,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:54,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108959427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:54,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:54,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:54,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751859711] [2021-06-12 19:44:54,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:54,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:54,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:54,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:54,540 INFO L87 Difference]: Start difference. First operand 2068 states and 6041 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:54,633 INFO L93 Difference]: Finished difference Result 2357 states and 6621 transitions. [2021-06-12 19:44:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:44:54,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-12 19:44:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:54,635 INFO L225 Difference]: With dead ends: 2357 [2021-06-12 19:44:54,635 INFO L226 Difference]: Without dead ends: 2357 [2021-06-12 19:44:54,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:44:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-06-12 19:44:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2117. [2021-06-12 19:44:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.9343100189035916) internal successors, (6209), 2116 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6209 transitions. [2021-06-12 19:44:54,657 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6209 transitions. Word has length 21 [2021-06-12 19:44:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:54,657 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6209 transitions. [2021-06-12 19:44:54,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6209 transitions. [2021-06-12 19:44:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:54,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:54,659 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:54,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39656 [2021-06-12 19:44:54,867 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:54,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:54,867 INFO L82 PathProgramCache]: Analyzing trace with hash 13530494, now seen corresponding path program 350 times [2021-06-12 19:44:54,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:54,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130326986] [2021-06-12 19:44:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:54,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:54,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130326986] [2021-06-12 19:44:54,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130326986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:54,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501686843] [2021-06-12 19:44:54,914 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 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 [2021-06-12 19:44:54,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:54,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:54,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:54,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501686843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:54,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:54,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:44:54,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518492262] [2021-06-12 19:44:54,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:44:54,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:44:54,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:54,966 INFO L87 Difference]: Start difference. First operand 2117 states and 6209 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:55,137 INFO L93 Difference]: Finished difference Result 2396 states and 6695 transitions. [2021-06-12 19:44:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:55,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-12 19:44:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:55,140 INFO L225 Difference]: With dead ends: 2396 [2021-06-12 19:44:55,140 INFO L226 Difference]: Without dead ends: 2392 [2021-06-12 19:44:55,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:44:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-06-12 19:44:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2136. [2021-06-12 19:44:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9400468384074943) internal successors, (6277), 2135 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6277 transitions. [2021-06-12 19:44:55,162 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6277 transitions. Word has length 21 [2021-06-12 19:44:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:55,162 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6277 transitions. [2021-06-12 19:44:55,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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) [2021-06-12 19:44:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6277 transitions. [2021-06-12 19:44:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:55,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:55,164 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:55,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39657 [2021-06-12 19:44:55,365 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:55,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:55,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2115307227, now seen corresponding path program 351 times [2021-06-12 19:44:55,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:55,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591828580] [2021-06-12 19:44:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:55,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:55,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591828580] [2021-06-12 19:44:55,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591828580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:55,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137185111] [2021-06-12 19:44:55,406 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 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 [2021-06-12 19:44:55,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:44:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:55,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137185111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:55,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:55,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:55,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903517144] [2021-06-12 19:44:55,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:55,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:55,460 INFO L87 Difference]: Start difference. First operand 2136 states and 6277 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:55,581 INFO L93 Difference]: Finished difference Result 2333 states and 6617 transitions. [2021-06-12 19:44:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-12 19:44:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:55,584 INFO L225 Difference]: With dead ends: 2333 [2021-06-12 19:44:55,584 INFO L226 Difference]: Without dead ends: 2331 [2021-06-12 19:44:55,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:44:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-12 19:44:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2136. [2021-06-12 19:44:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9395784543325525) internal successors, (6276), 2135 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6276 transitions. [2021-06-12 19:44:55,611 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6276 transitions. Word has length 21 [2021-06-12 19:44:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:55,611 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6276 transitions. [2021-06-12 19:44:55,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6276 transitions. [2021-06-12 19:44:55,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:55,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:55,613 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:55,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39658,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:55,813 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1518396286, now seen corresponding path program 352 times [2021-06-12 19:44:55,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:55,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608257667] [2021-06-12 19:44:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:55,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:55,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608257667] [2021-06-12 19:44:55,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608257667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:55,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305677439] [2021-06-12 19:44:55,853 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 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 [2021-06-12 19:44:55,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:55,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:55,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:55,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305677439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:55,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:55,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:55,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456763659] [2021-06-12 19:44:55,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:55,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:55,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:55,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:55,910 INFO L87 Difference]: Start difference. First operand 2136 states and 6276 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:55,976 INFO L93 Difference]: Finished difference Result 2457 states and 6862 transitions. [2021-06-12 19:44:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:44:55,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-12 19:44:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:55,978 INFO L225 Difference]: With dead ends: 2457 [2021-06-12 19:44:55,978 INFO L226 Difference]: Without dead ends: 2457 [2021-06-12 19:44:55,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-12 19:44:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2126. [2021-06-12 19:44:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9345882352941177) internal successors, (6236), 2125 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6236 transitions. [2021-06-12 19:44:56,001 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6236 transitions. Word has length 21 [2021-06-12 19:44:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:56,001 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6236 transitions. [2021-06-12 19:44:56,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:56,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6236 transitions. [2021-06-12 19:44:56,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:56,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:56,003 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:56,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39659 [2021-06-12 19:44:56,204 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:56,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1020762949, now seen corresponding path program 353 times [2021-06-12 19:44:56,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:56,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641691500] [2021-06-12 19:44:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:56,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:56,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641691500] [2021-06-12 19:44:56,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641691500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:56,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892874101] [2021-06-12 19:44:56,265 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 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 [2021-06-12 19:44:56,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:44:56,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:56,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:56,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:56,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892874101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:56,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:56,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:56,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572093092] [2021-06-12 19:44:56,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:56,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:56,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:56,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:56,318 INFO L87 Difference]: Start difference. First operand 2126 states and 6236 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:56,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:56,437 INFO L93 Difference]: Finished difference Result 2437 states and 6925 transitions. [2021-06-12 19:44:56,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:56,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:56,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:56,439 INFO L225 Difference]: With dead ends: 2437 [2021-06-12 19:44:56,439 INFO L226 Difference]: Without dead ends: 2425 [2021-06-12 19:44:56,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:44:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-12 19:44:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2126. [2021-06-12 19:44:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9336470588235293) internal successors, (6234), 2125 states have internal predecessors, (6234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6234 transitions. [2021-06-12 19:44:56,461 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6234 transitions. Word has length 21 [2021-06-12 19:44:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:56,461 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6234 transitions. [2021-06-12 19:44:56,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6234 transitions. [2021-06-12 19:44:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:56,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:56,462 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:56,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39660,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:56,663 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:56,663 INFO L82 PathProgramCache]: Analyzing trace with hash -684556226, now seen corresponding path program 354 times [2021-06-12 19:44:56,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:56,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010451647] [2021-06-12 19:44:56,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:56,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010451647] [2021-06-12 19:44:56,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010451647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60907074] [2021-06-12 19:44:56,716 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 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 [2021-06-12 19:44:56,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:44:56,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:56,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:56,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:56,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60907074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:56,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:56,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:44:56,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327629265] [2021-06-12 19:44:56,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:44:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:44:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:44:56,771 INFO L87 Difference]: Start difference. First operand 2126 states and 6234 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:56,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:56,965 INFO L93 Difference]: Finished difference Result 2763 states and 7759 transitions. [2021-06-12 19:44:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:44:56,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:44:56,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:56,968 INFO L225 Difference]: With dead ends: 2763 [2021-06-12 19:44:56,969 INFO L226 Difference]: Without dead ends: 2763 [2021-06-12 19:44:56,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:44:56,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-06-12 19:44:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2240. [2021-06-12 19:44:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.9383653416703885) internal successors, (6579), 2239 states have internal predecessors, (6579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6579 transitions. [2021-06-12 19:44:56,993 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6579 transitions. Word has length 21 [2021-06-12 19:44:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:56,993 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6579 transitions. [2021-06-12 19:44:56,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:44:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6579 transitions. [2021-06-12 19:44:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:56,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:56,995 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:57,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39661,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:57,196 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:57,196 INFO L82 PathProgramCache]: Analyzing trace with hash 723601057, now seen corresponding path program 355 times [2021-06-12 19:44:57,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:57,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776314667] [2021-06-12 19:44:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:57,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:57,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776314667] [2021-06-12 19:44:57,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776314667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297422849] [2021-06-12 19:44:57,257 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 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 [2021-06-12 19:44:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:57,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:57,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:57,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297422849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:57,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:57,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:57,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499266135] [2021-06-12 19:44:57,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:57,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:57,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:57,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:57,331 INFO L87 Difference]: Start difference. First operand 2240 states and 6579 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:57,480 INFO L93 Difference]: Finished difference Result 2620 states and 7456 transitions. [2021-06-12 19:44:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:44:57,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:57,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:57,483 INFO L225 Difference]: With dead ends: 2620 [2021-06-12 19:44:57,483 INFO L226 Difference]: Without dead ends: 2608 [2021-06-12 19:44:57,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:44:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-12 19:44:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2240. [2021-06-12 19:44:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.935685573916927) internal successors, (6573), 2239 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6573 transitions. [2021-06-12 19:44:57,509 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6573 transitions. Word has length 21 [2021-06-12 19:44:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:57,509 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6573 transitions. [2021-06-12 19:44:57,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6573 transitions. [2021-06-12 19:44:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:57,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:57,511 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:57,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39662 [2021-06-12 19:44:57,711 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:57,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1059807780, now seen corresponding path program 356 times [2021-06-12 19:44:57,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:57,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350497132] [2021-06-12 19:44:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:57,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:57,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350497132] [2021-06-12 19:44:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350497132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341087383] [2021-06-12 19:44:57,765 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 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 [2021-06-12 19:44:57,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:44:57,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:57,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341087383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:57,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:57,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:57,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719011961] [2021-06-12 19:44:57,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:57,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:57,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:57,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:57,839 INFO L87 Difference]: Start difference. First operand 2240 states and 6573 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:58,013 INFO L93 Difference]: Finished difference Result 2711 states and 7663 transitions. [2021-06-12 19:44:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:58,016 INFO L225 Difference]: With dead ends: 2711 [2021-06-12 19:44:58,016 INFO L226 Difference]: Without dead ends: 2711 [2021-06-12 19:44:58,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:44:58,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-12 19:44:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 1587. [2021-06-12 19:44:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.91109709962169) internal successors, (4617), 1586 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4617 transitions. [2021-06-12 19:44:58,035 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4617 transitions. Word has length 21 [2021-06-12 19:44:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:58,036 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4617 transitions. [2021-06-12 19:44:58,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4617 transitions. [2021-06-12 19:44:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:58,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:58,037 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:58,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39663,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:58,238 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1390653083, now seen corresponding path program 357 times [2021-06-12 19:44:58,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:58,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815508701] [2021-06-12 19:44:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:58,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:58,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815508701] [2021-06-12 19:44:58,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815508701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:58,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38167822] [2021-06-12 19:44:58,299 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 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 [2021-06-12 19:44:58,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:44:58,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:58,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:58,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38167822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:58,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:58,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:58,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009355458] [2021-06-12 19:44:58,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:58,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:58,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:58,361 INFO L87 Difference]: Start difference. First operand 1587 states and 4617 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:58,464 INFO L93 Difference]: Finished difference Result 2083 states and 5732 transitions. [2021-06-12 19:44:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:44:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:58,467 INFO L225 Difference]: With dead ends: 2083 [2021-06-12 19:44:58,467 INFO L226 Difference]: Without dead ends: 2069 [2021-06-12 19:44:58,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:44:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-12 19:44:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1608. [2021-06-12 19:44:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.8985687616677036) internal successors, (4658), 1607 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4658 transitions. [2021-06-12 19:44:58,483 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4658 transitions. Word has length 21 [2021-06-12 19:44:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:58,484 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4658 transitions. [2021-06-12 19:44:58,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4658 transitions. [2021-06-12 19:44:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:58,485 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:58,485 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:58,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39664,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:58,685 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash 423340926, now seen corresponding path program 358 times [2021-06-12 19:44:58,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:58,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923878452] [2021-06-12 19:44:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:58,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:58,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923878452] [2021-06-12 19:44:58,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923878452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:58,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291709822] [2021-06-12 19:44:58,742 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 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 [2021-06-12 19:44:58,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:44:58,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:58,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291709822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:58,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:58,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:44:58,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498969015] [2021-06-12 19:44:58,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:44:58,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:58,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:44:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:44:58,804 INFO L87 Difference]: Start difference. First operand 1608 states and 4658 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:59,050 INFO L93 Difference]: Finished difference Result 2373 states and 6517 transitions. [2021-06-12 19:44:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:44:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:44:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:59,052 INFO L225 Difference]: With dead ends: 2373 [2021-06-12 19:44:59,053 INFO L226 Difference]: Without dead ends: 2373 [2021-06-12 19:44:59,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:44:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-06-12 19:44:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1546. [2021-06-12 19:44:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.8944983818770225) internal successors, (4472), 1545 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 4472 transitions. [2021-06-12 19:44:59,069 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 4472 transitions. Word has length 21 [2021-06-12 19:44:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:59,070 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 4472 transitions. [2021-06-12 19:44:59,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:44:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 4472 transitions. [2021-06-12 19:44:59,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:59,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:59,071 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:59,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39665,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:59,271 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:59,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:59,272 INFO L82 PathProgramCache]: Analyzing trace with hash 180726139, now seen corresponding path program 359 times [2021-06-12 19:44:59,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:59,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875798015] [2021-06-12 19:44:59,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:59,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:59,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875798015] [2021-06-12 19:44:59,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875798015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:59,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532692139] [2021-06-12 19:44:59,312 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 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 [2021-06-12 19:44:59,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:44:59,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:59,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:59,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:59,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532692139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:59,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:59,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:59,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656241811] [2021-06-12 19:44:59,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:59,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:59,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:59,369 INFO L87 Difference]: Start difference. First operand 1546 states and 4472 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:59,429 INFO L93 Difference]: Finished difference Result 2113 states and 5765 transitions. [2021-06-12 19:44:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:44:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-12 19:44:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:59,431 INFO L225 Difference]: With dead ends: 2113 [2021-06-12 19:44:59,431 INFO L226 Difference]: Without dead ends: 2113 [2021-06-12 19:44:59,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:44:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-12 19:44:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1736. [2021-06-12 19:44:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.936023054755043) internal successors, (5094), 1735 states have internal predecessors, (5094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5094 transitions. [2021-06-12 19:44:59,449 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5094 transitions. Word has length 21 [2021-06-12 19:44:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:59,449 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5094 transitions. [2021-06-12 19:44:59,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5094 transitions. [2021-06-12 19:44:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:59,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:59,451 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:44:59,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39666,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:44:59,651 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:44:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:44:59,651 INFO L82 PathProgramCache]: Analyzing trace with hash 261856424, now seen corresponding path program 360 times [2021-06-12 19:44:59,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:44:59,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520264196] [2021-06-12 19:44:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:44:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:44:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:44:59,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:44:59,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520264196] [2021-06-12 19:44:59,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520264196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:59,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040849370] [2021-06-12 19:44:59,690 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 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 [2021-06-12 19:44:59,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:44:59,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:44:59,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:44:59,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:44:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:44:59,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040849370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:44:59,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:44:59,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:44:59,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359725566] [2021-06-12 19:44:59,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:44:59,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:44:59,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:44:59,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:44:59,743 INFO L87 Difference]: Start difference. First operand 1736 states and 5094 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:44:59,871 INFO L93 Difference]: Finished difference Result 1970 states and 5495 transitions. [2021-06-12 19:44:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:44:59,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-12 19:44:59,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:44:59,873 INFO L225 Difference]: With dead ends: 1970 [2021-06-12 19:44:59,873 INFO L226 Difference]: Without dead ends: 1968 [2021-06-12 19:44:59,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:44:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-12 19:44:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1755. [2021-06-12 19:44:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.944127708095781) internal successors, (5164), 1754 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:44:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5164 transitions. [2021-06-12 19:44:59,892 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5164 transitions. Word has length 21 [2021-06-12 19:44:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:44:59,892 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5164 transitions. [2021-06-12 19:44:59,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:44:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5164 transitions. [2021-06-12 19:44:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:44:59,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:44:59,894 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:00,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39667,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:00,095 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:00,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1775453631, now seen corresponding path program 361 times [2021-06-12 19:45:00,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:00,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791753287] [2021-06-12 19:45:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:00,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791753287] [2021-06-12 19:45:00,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791753287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880252564] [2021-06-12 19:45:00,136 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 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 [2021-06-12 19:45:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:00,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:00,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880252564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:00,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:00,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:45:00,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052435334] [2021-06-12 19:45:00,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:45:00,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:00,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:45:00,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:45:00,188 INFO L87 Difference]: Start difference. First operand 1755 states and 5164 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:45:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:00,312 INFO L93 Difference]: Finished difference Result 2106 states and 5785 transitions. [2021-06-12 19:45:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:00,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-12 19:45:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:00,314 INFO L225 Difference]: With dead ends: 2106 [2021-06-12 19:45:00,315 INFO L226 Difference]: Without dead ends: 2104 [2021-06-12 19:45:00,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:45:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-12 19:45:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1755. [2021-06-12 19:45:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.943557582668187) internal successors, (5163), 1754 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5163 transitions. [2021-06-12 19:45:00,333 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5163 transitions. Word has length 21 [2021-06-12 19:45:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:00,333 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5163 transitions. [2021-06-12 19:45:00,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:45:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5163 transitions. [2021-06-12 19:45:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:00,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:00,334 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:00,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39668 [2021-06-12 19:45:00,535 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:00,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1114189848, now seen corresponding path program 362 times [2021-06-12 19:45:00,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:00,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033307100] [2021-06-12 19:45:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:00,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:00,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033307100] [2021-06-12 19:45:00,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033307100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:00,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944774622] [2021-06-12 19:45:00,574 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 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 [2021-06-12 19:45:00,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:00,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:00,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944774622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:00,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:00,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:45:00,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411253130] [2021-06-12 19:45:00,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:45:00,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:00,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:45:00,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:45:00,629 INFO L87 Difference]: Start difference. First operand 1755 states and 5163 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:45:00,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:00,711 INFO L93 Difference]: Finished difference Result 2027 states and 5646 transitions. [2021-06-12 19:45:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:45:00,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-12 19:45:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:00,713 INFO L225 Difference]: With dead ends: 2027 [2021-06-12 19:45:00,713 INFO L226 Difference]: Without dead ends: 2027 [2021-06-12 19:45:00,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-12 19:45:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1735. [2021-06-12 19:45:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 2.9371395617070357) internal successors, (5093), 1734 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 5093 transitions. [2021-06-12 19:45:00,731 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 5093 transitions. Word has length 21 [2021-06-12 19:45:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:00,732 INFO L482 AbstractCegarLoop]: Abstraction has 1735 states and 5093 transitions. [2021-06-12 19:45:00,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-06-12 19:45:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 5093 transitions. [2021-06-12 19:45:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:00,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:00,733 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:00,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39669 [2021-06-12 19:45:00,934 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:00,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:00,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1875263, now seen corresponding path program 363 times [2021-06-12 19:45:00,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:00,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145127466] [2021-06-12 19:45:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:00,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145127466] [2021-06-12 19:45:00,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145127466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:00,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815822964] [2021-06-12 19:45:00,982 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 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 [2021-06-12 19:45:01,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:45:01,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:01,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:01,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:01,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815822964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:01,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:01,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:01,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335273580] [2021-06-12 19:45:01,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:01,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:01,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:01,045 INFO L87 Difference]: Start difference. First operand 1735 states and 5093 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:01,176 INFO L93 Difference]: Finished difference Result 2088 states and 5771 transitions. [2021-06-12 19:45:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:01,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:01,178 INFO L225 Difference]: With dead ends: 2088 [2021-06-12 19:45:01,178 INFO L226 Difference]: Without dead ends: 2078 [2021-06-12 19:45:01,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:45:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-06-12 19:45:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1761. [2021-06-12 19:45:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.947159090909091) internal successors, (5187), 1760 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 5187 transitions. [2021-06-12 19:45:01,197 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 5187 transitions. Word has length 21 [2021-06-12 19:45:01,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:01,198 INFO L482 AbstractCegarLoop]: Abstraction has 1761 states and 5187 transitions. [2021-06-12 19:45:01,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 5187 transitions. [2021-06-12 19:45:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:01,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:01,199 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:01,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39670,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:01,400 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:01,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1050203909, now seen corresponding path program 364 times [2021-06-12 19:45:01,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:01,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896926559] [2021-06-12 19:45:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:01,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:01,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896926559] [2021-06-12 19:45:01,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896926559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:01,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030973727] [2021-06-12 19:45:01,449 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 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 [2021-06-12 19:45:01,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:01,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:01,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:01,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030973727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:01,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:01,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:01,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814817595] [2021-06-12 19:45:01,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:01,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:01,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:01,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:01,507 INFO L87 Difference]: Start difference. First operand 1761 states and 5187 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:01,663 INFO L93 Difference]: Finished difference Result 2110 states and 5814 transitions. [2021-06-12 19:45:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:45:01,663 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:01,665 INFO L225 Difference]: With dead ends: 2110 [2021-06-12 19:45:01,665 INFO L226 Difference]: Without dead ends: 2102 [2021-06-12 19:45:01,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:45:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-06-12 19:45:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1765. [2021-06-12 19:45:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.945011337868481) internal successors, (5195), 1764 states have internal predecessors, (5195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5195 transitions. [2021-06-12 19:45:01,684 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5195 transitions. Word has length 21 [2021-06-12 19:45:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:01,684 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 5195 transitions. [2021-06-12 19:45:01,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5195 transitions. [2021-06-12 19:45:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:01,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:01,686 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:01,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39671 [2021-06-12 19:45:01,886 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:01,886 INFO L82 PathProgramCache]: Analyzing trace with hash -915160642, now seen corresponding path program 365 times [2021-06-12 19:45:01,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:01,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159092555] [2021-06-12 19:45:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:01,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:01,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159092555] [2021-06-12 19:45:01,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159092555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:01,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101879916] [2021-06-12 19:45:01,955 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 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 [2021-06-12 19:45:01,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:45:01,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:01,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:02,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101879916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:02,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:02,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:02,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426377412] [2021-06-12 19:45:02,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:02,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:02,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:02,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:02,024 INFO L87 Difference]: Start difference. First operand 1765 states and 5195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:02,133 INFO L93 Difference]: Finished difference Result 2026 states and 5698 transitions. [2021-06-12 19:45:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:45:02,134 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:02,135 INFO L225 Difference]: With dead ends: 2026 [2021-06-12 19:45:02,136 INFO L226 Difference]: Without dead ends: 2026 [2021-06-12 19:45:02,136 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:45:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-12 19:45:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1701. [2021-06-12 19:45:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.9376470588235293) internal successors, (4994), 1700 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4994 transitions. [2021-06-12 19:45:02,154 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4994 transitions. Word has length 21 [2021-06-12 19:45:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:02,154 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4994 transitions. [2021-06-12 19:45:02,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4994 transitions. [2021-06-12 19:45:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:02,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:02,156 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:02,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39672 [2021-06-12 19:45:02,356 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash 695080127, now seen corresponding path program 366 times [2021-06-12 19:45:02,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:02,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101792589] [2021-06-12 19:45:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:02,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:02,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101792589] [2021-06-12 19:45:02,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101792589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:02,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557446681] [2021-06-12 19:45:02,410 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 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 [2021-06-12 19:45:02,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:45:02,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:02,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:02,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:02,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557446681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:02,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:02,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:02,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815442928] [2021-06-12 19:45:02,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:02,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:02,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:02,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:02,471 INFO L87 Difference]: Start difference. First operand 1701 states and 4994 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:02,628 INFO L93 Difference]: Finished difference Result 2422 states and 6653 transitions. [2021-06-12 19:45:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:45:02,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:02,630 INFO L225 Difference]: With dead ends: 2422 [2021-06-12 19:45:02,630 INFO L226 Difference]: Without dead ends: 2402 [2021-06-12 19:45:02,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:45:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-06-12 19:45:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1701. [2021-06-12 19:45:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.934705882352941) internal successors, (4989), 1700 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4989 transitions. [2021-06-12 19:45:02,650 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4989 transitions. Word has length 21 [2021-06-12 19:45:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:02,651 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4989 transitions. [2021-06-12 19:45:02,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4989 transitions. [2021-06-12 19:45:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:02,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:02,652 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:02,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39673,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:02,853 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash 567974296, now seen corresponding path program 367 times [2021-06-12 19:45:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:02,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522966579] [2021-06-12 19:45:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:02,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:02,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522966579] [2021-06-12 19:45:02,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522966579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:02,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569448142] [2021-06-12 19:45:02,915 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 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 [2021-06-12 19:45:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:02,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:02,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:02,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569448142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:02,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:02,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:02,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660589976] [2021-06-12 19:45:02,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:02,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:02,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:02,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:02,976 INFO L87 Difference]: Start difference. First operand 1701 states and 4989 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:03,062 INFO L93 Difference]: Finished difference Result 2175 states and 6221 transitions. [2021-06-12 19:45:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:45:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:03,064 INFO L225 Difference]: With dead ends: 2175 [2021-06-12 19:45:03,064 INFO L226 Difference]: Without dead ends: 2175 [2021-06-12 19:45:03,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:45:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-06-12 19:45:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2028. [2021-06-12 19:45:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.938332511100148) internal successors, (5956), 2027 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5956 transitions. [2021-06-12 19:45:03,084 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5956 transitions. Word has length 21 [2021-06-12 19:45:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:03,084 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5956 transitions. [2021-06-12 19:45:03,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5956 transitions. [2021-06-12 19:45:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:03,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:03,086 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:03,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39674,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:03,286 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1035689605, now seen corresponding path program 368 times [2021-06-12 19:45:03,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:03,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808385175] [2021-06-12 19:45:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:03,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:03,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808385175] [2021-06-12 19:45:03,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808385175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:03,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421406154] [2021-06-12 19:45:03,346 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 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 [2021-06-12 19:45:03,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:03,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:03,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:03,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:03,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421406154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:03,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:03,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:03,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375749837] [2021-06-12 19:45:03,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:03,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:03,405 INFO L87 Difference]: Start difference. First operand 2028 states and 5956 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:03,554 INFO L93 Difference]: Finished difference Result 2740 states and 7631 transitions. [2021-06-12 19:45:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:03,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:03,558 INFO L225 Difference]: With dead ends: 2740 [2021-06-12 19:45:03,558 INFO L226 Difference]: Without dead ends: 2728 [2021-06-12 19:45:03,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:03,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-12 19:45:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2062. [2021-06-12 19:45:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.937894226103833) internal successors, (6055), 2061 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6055 transitions. [2021-06-12 19:45:03,585 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6055 transitions. Word has length 21 [2021-06-12 19:45:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:03,585 INFO L482 AbstractCegarLoop]: Abstraction has 2062 states and 6055 transitions. [2021-06-12 19:45:03,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6055 transitions. [2021-06-12 19:45:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:03,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:03,587 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:03,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39675,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:03,787 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:03,788 INFO L82 PathProgramCache]: Analyzing trace with hash -699482882, now seen corresponding path program 369 times [2021-06-12 19:45:03,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:03,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776830455] [2021-06-12 19:45:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:03,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:03,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776830455] [2021-06-12 19:45:03,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776830455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:03,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937665043] [2021-06-12 19:45:03,843 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 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 [2021-06-12 19:45:03,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:45:03,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:03,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:03,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:03,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937665043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:03,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:03,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:03,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962567232] [2021-06-12 19:45:03,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:03,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:03,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:03,909 INFO L87 Difference]: Start difference. First operand 2062 states and 6055 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:04,066 INFO L93 Difference]: Finished difference Result 2298 states and 6476 transitions. [2021-06-12 19:45:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:45:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:04,068 INFO L225 Difference]: With dead ends: 2298 [2021-06-12 19:45:04,069 INFO L226 Difference]: Without dead ends: 2298 [2021-06-12 19:45:04,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-12 19:45:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2031. [2021-06-12 19:45:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9369458128078816) internal successors, (5962), 2030 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5962 transitions. [2021-06-12 19:45:04,090 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5962 transitions. Word has length 21 [2021-06-12 19:45:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:04,090 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5962 transitions. [2021-06-12 19:45:04,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:04,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5962 transitions. [2021-06-12 19:45:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:04,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:04,092 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:04,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39676,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:04,293 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1145023551, now seen corresponding path program 370 times [2021-06-12 19:45:04,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:04,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491417130] [2021-06-12 19:45:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:04,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:04,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491417130] [2021-06-12 19:45:04,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491417130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:04,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510831713] [2021-06-12 19:45:04,357 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 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 [2021-06-12 19:45:04,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:04,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:04,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:04,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:04,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510831713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:04,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:04,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:04,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787479136] [2021-06-12 19:45:04,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:04,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:04,418 INFO L87 Difference]: Start difference. First operand 2031 states and 5962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:04,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:04,511 INFO L93 Difference]: Finished difference Result 2345 states and 6662 transitions. [2021-06-12 19:45:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:45:04,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:04,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:04,514 INFO L225 Difference]: With dead ends: 2345 [2021-06-12 19:45:04,514 INFO L226 Difference]: Without dead ends: 2331 [2021-06-12 19:45:04,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:45:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-12 19:45:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2031. [2021-06-12 19:45:04,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9364532019704432) internal successors, (5961), 2030 states have internal predecessors, (5961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5961 transitions. [2021-06-12 19:45:04,534 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5961 transitions. Word has length 21 [2021-06-12 19:45:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:04,535 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5961 transitions. [2021-06-12 19:45:04,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5961 transitions. [2021-06-12 19:45:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:04,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:04,537 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:04,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39677,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:04,753 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:04,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1335949736, now seen corresponding path program 371 times [2021-06-12 19:45:04,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:04,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008275412] [2021-06-12 19:45:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:04,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:04,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008275412] [2021-06-12 19:45:04,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008275412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:04,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021746142] [2021-06-12 19:45:04,813 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 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 [2021-06-12 19:45:04,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:45:04,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:04,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021746142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:04,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:04,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:04,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952592670] [2021-06-12 19:45:04,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:04,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:04,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:04,880 INFO L87 Difference]: Start difference. First operand 2031 states and 5961 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:05,093 INFO L93 Difference]: Finished difference Result 2359 states and 6653 transitions. [2021-06-12 19:45:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:45:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:05,095 INFO L225 Difference]: With dead ends: 2359 [2021-06-12 19:45:05,095 INFO L226 Difference]: Without dead ends: 2359 [2021-06-12 19:45:05,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:45:05,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-12 19:45:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2104. [2021-06-12 19:45:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9381835473133617) internal successors, (6179), 2103 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6179 transitions. [2021-06-12 19:45:05,117 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6179 transitions. Word has length 21 [2021-06-12 19:45:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:05,117 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6179 transitions. [2021-06-12 19:45:05,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6179 transitions. [2021-06-12 19:45:05,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:05,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:05,119 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:05,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39678 [2021-06-12 19:45:05,337 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash 27654651, now seen corresponding path program 372 times [2021-06-12 19:45:05,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:05,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37582179] [2021-06-12 19:45:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:05,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:05,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37582179] [2021-06-12 19:45:05,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37582179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:05,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338437962] [2021-06-12 19:45:05,407 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 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 [2021-06-12 19:45:05,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:45:05,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:05,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:05,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338437962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:05,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:05,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:05,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955539129] [2021-06-12 19:45:05,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:05,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:05,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:05,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:05,472 INFO L87 Difference]: Start difference. First operand 2104 states and 6179 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:05,549 INFO L93 Difference]: Finished difference Result 2399 states and 6834 transitions. [2021-06-12 19:45:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:45:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:05,553 INFO L225 Difference]: With dead ends: 2399 [2021-06-12 19:45:05,553 INFO L226 Difference]: Without dead ends: 2383 [2021-06-12 19:45:05,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:45:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-12 19:45:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2104. [2021-06-12 19:45:05,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9377080361388495) internal successors, (6178), 2103 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6178 transitions. [2021-06-12 19:45:05,577 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6178 transitions. Word has length 21 [2021-06-12 19:45:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:05,577 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6178 transitions. [2021-06-12 19:45:05,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6178 transitions. [2021-06-12 19:45:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:05,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:05,579 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:05,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39679 [2021-06-12 19:45:05,780 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash 408414270, now seen corresponding path program 373 times [2021-06-12 19:45:05,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:05,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015397558] [2021-06-12 19:45:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:05,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:05,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015397558] [2021-06-12 19:45:05,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015397558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:05,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413716090] [2021-06-12 19:45:05,848 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 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 [2021-06-12 19:45:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:05,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:05,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413716090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:05,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:05,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:05,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117102900] [2021-06-12 19:45:05,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:05,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:05,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:05,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:05,915 INFO L87 Difference]: Start difference. First operand 2104 states and 6178 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:06,151 INFO L93 Difference]: Finished difference Result 2543 states and 7159 transitions. [2021-06-12 19:45:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:45:06,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:06,154 INFO L225 Difference]: With dead ends: 2543 [2021-06-12 19:45:06,154 INFO L226 Difference]: Without dead ends: 2543 [2021-06-12 19:45:06,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:45:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-06-12 19:45:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2128. [2021-06-12 19:45:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.938410907381288) internal successors, (6250), 2127 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 6250 transitions. [2021-06-12 19:45:06,181 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 6250 transitions. Word has length 21 [2021-06-12 19:45:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:06,181 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 6250 transitions. [2021-06-12 19:45:06,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 6250 transitions. [2021-06-12 19:45:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:06,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:06,183 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:06,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39680,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:06,383 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:06,384 INFO L82 PathProgramCache]: Analyzing trace with hash -962719899, now seen corresponding path program 374 times [2021-06-12 19:45:06,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:06,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594386565] [2021-06-12 19:45:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:06,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:06,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594386565] [2021-06-12 19:45:06,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594386565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:06,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942847469] [2021-06-12 19:45:06,439 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 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 [2021-06-12 19:45:06,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:06,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:06,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:06,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942847469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:06,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:06,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:45:06,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580028338] [2021-06-12 19:45:06,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:06,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:06,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:06,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:06,496 INFO L87 Difference]: Start difference. First operand 2128 states and 6250 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:06,589 INFO L93 Difference]: Finished difference Result 2474 states and 6959 transitions. [2021-06-12 19:45:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:45:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:06,592 INFO L225 Difference]: With dead ends: 2474 [2021-06-12 19:45:06,592 INFO L226 Difference]: Without dead ends: 2474 [2021-06-12 19:45:06,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:45:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-12 19:45:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2190. [2021-06-12 19:45:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 2.9520328917313843) internal successors, (6462), 2189 states have internal predecessors, (6462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 6462 transitions. [2021-06-12 19:45:06,615 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 6462 transitions. Word has length 21 [2021-06-12 19:45:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:06,615 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 6462 transitions. [2021-06-12 19:45:06,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 6462 transitions. [2021-06-12 19:45:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:06,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:06,617 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:06,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39681 [2021-06-12 19:45:06,817 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:06,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318936, now seen corresponding path program 375 times [2021-06-12 19:45:06,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:06,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803766198] [2021-06-12 19:45:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:06,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:06,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803766198] [2021-06-12 19:45:06,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803766198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:06,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989778352] [2021-06-12 19:45:06,895 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 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 [2021-06-12 19:45:06,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:45:06,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:06,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:06,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989778352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:06,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:06,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:45:06,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762056950] [2021-06-12 19:45:06,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:06,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:06,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:06,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:06,955 INFO L87 Difference]: Start difference. First operand 2190 states and 6462 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:07,234 INFO L93 Difference]: Finished difference Result 2504 states and 7007 transitions. [2021-06-12 19:45:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:45:07,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:07,237 INFO L225 Difference]: With dead ends: 2504 [2021-06-12 19:45:07,237 INFO L226 Difference]: Without dead ends: 2500 [2021-06-12 19:45:07,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-06-12 19:45:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2209. [2021-06-12 19:45:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.9556159420289854) internal successors, (6526), 2208 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6526 transitions. [2021-06-12 19:45:07,260 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6526 transitions. Word has length 21 [2021-06-12 19:45:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:07,261 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6526 transitions. [2021-06-12 19:45:07,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6526 transitions. [2021-06-12 19:45:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:07,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:07,262 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:07,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39682,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:07,463 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:07,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:07,463 INFO L82 PathProgramCache]: Analyzing trace with hash -576518785, now seen corresponding path program 376 times [2021-06-12 19:45:07,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:07,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780398448] [2021-06-12 19:45:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:07,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:07,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780398448] [2021-06-12 19:45:07,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780398448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:07,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038412911] [2021-06-12 19:45:07,542 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 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 [2021-06-12 19:45:07,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:07,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:07,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038412911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:07,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:07,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:07,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359561913] [2021-06-12 19:45:07,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:07,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:07,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:07,637 INFO L87 Difference]: Start difference. First operand 2209 states and 6526 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:07,758 INFO L93 Difference]: Finished difference Result 2434 states and 6886 transitions. [2021-06-12 19:45:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:45:07,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:07,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:07,761 INFO L225 Difference]: With dead ends: 2434 [2021-06-12 19:45:07,761 INFO L226 Difference]: Without dead ends: 2428 [2021-06-12 19:45:07,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:45:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-12 19:45:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2191. [2021-06-12 19:45:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 2.948401826484018) internal successors, (6457), 2190 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6457 transitions. [2021-06-12 19:45:07,783 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6457 transitions. Word has length 21 [2021-06-12 19:45:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:07,783 INFO L482 AbstractCegarLoop]: Abstraction has 2191 states and 6457 transitions. [2021-06-12 19:45:07,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6457 transitions. [2021-06-12 19:45:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:07,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:07,785 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:07,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39683,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:07,986 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:07,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1237782568, now seen corresponding path program 377 times [2021-06-12 19:45:07,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:07,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136913059] [2021-06-12 19:45:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:08,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:08,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136913059] [2021-06-12 19:45:08,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136913059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:08,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384245731] [2021-06-12 19:45:08,066 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 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 [2021-06-12 19:45:08,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:08,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:08,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:08,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:08,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384245731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:08,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:08,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979793282] [2021-06-12 19:45:08,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:08,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:08,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:08,125 INFO L87 Difference]: Start difference. First operand 2191 states and 6457 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:08,200 INFO L93 Difference]: Finished difference Result 2597 states and 7234 transitions. [2021-06-12 19:45:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:45:08,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:08,203 INFO L225 Difference]: With dead ends: 2597 [2021-06-12 19:45:08,203 INFO L226 Difference]: Without dead ends: 2597 [2021-06-12 19:45:08,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:45:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-06-12 19:45:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2201. [2021-06-12 19:45:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.945909090909091) internal successors, (6481), 2200 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6481 transitions. [2021-06-12 19:45:08,227 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6481 transitions. Word has length 21 [2021-06-12 19:45:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:08,227 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6481 transitions. [2021-06-12 19:45:08,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6481 transitions. [2021-06-12 19:45:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:08,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:08,230 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:08,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39684,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:08,430 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:08,430 INFO L82 PathProgramCache]: Analyzing trace with hash 577001109, now seen corresponding path program 378 times [2021-06-12 19:45:08,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:08,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815963059] [2021-06-12 19:45:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:08,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:08,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815963059] [2021-06-12 19:45:08,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815963059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:08,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289705408] [2021-06-12 19:45:08,483 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 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 [2021-06-12 19:45:08,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:45:08,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:08,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:08,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:08,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289705408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:08,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:08,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:08,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965324753] [2021-06-12 19:45:08,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:08,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:08,535 INFO L87 Difference]: Start difference. First operand 2201 states and 6481 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:08,666 INFO L93 Difference]: Finished difference Result 2455 states and 6971 transitions. [2021-06-12 19:45:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:45:08,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:08,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:08,669 INFO L225 Difference]: With dead ends: 2455 [2021-06-12 19:45:08,669 INFO L226 Difference]: Without dead ends: 2449 [2021-06-12 19:45:08,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:45:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-12 19:45:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 2201. [2021-06-12 19:45:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.9454545454545453) internal successors, (6480), 2200 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6480 transitions. [2021-06-12 19:45:08,691 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6480 transitions. Word has length 21 [2021-06-12 19:45:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:08,691 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6480 transitions. [2021-06-12 19:45:08,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6480 transitions. [2021-06-12 19:45:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:08,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:08,693 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:08,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39685,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:08,893 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:08,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1534180504, now seen corresponding path program 379 times [2021-06-12 19:45:08,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:08,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394201798] [2021-06-12 19:45:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:08,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:08,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394201798] [2021-06-12 19:45:08,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394201798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:08,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360650510] [2021-06-12 19:45:08,956 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 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 [2021-06-12 19:45:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:08,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:09,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360650510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:09,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:09,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:09,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338075267] [2021-06-12 19:45:09,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:09,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:09,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:09,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:09,025 INFO L87 Difference]: Start difference. First operand 2201 states and 6480 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:09,110 INFO L93 Difference]: Finished difference Result 2588 states and 7244 transitions. [2021-06-12 19:45:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:45:09,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:09,113 INFO L225 Difference]: With dead ends: 2588 [2021-06-12 19:45:09,113 INFO L226 Difference]: Without dead ends: 2588 [2021-06-12 19:45:09,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:45:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-12 19:45:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2203. [2021-06-12 19:45:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9436875567665757) internal successors, (6482), 2202 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6482 transitions. [2021-06-12 19:45:09,136 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6482 transitions. Word has length 21 [2021-06-12 19:45:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:09,136 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6482 transitions. [2021-06-12 19:45:09,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:09,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6482 transitions. [2021-06-12 19:45:09,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:09,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:09,138 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:09,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39686,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:09,339 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:09,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:09,339 INFO L82 PathProgramCache]: Analyzing trace with hash 148135359, now seen corresponding path program 380 times [2021-06-12 19:45:09,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:09,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049263243] [2021-06-12 19:45:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:09,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049263243] [2021-06-12 19:45:09,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049263243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859560343] [2021-06-12 19:45:09,393 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 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 [2021-06-12 19:45:09,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:09,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:09,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:09,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:09,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859560343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:09,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:09,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:09,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486531662] [2021-06-12 19:45:09,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:09,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:09,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:09,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:09,455 INFO L87 Difference]: Start difference. First operand 2203 states and 6482 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:09,716 INFO L93 Difference]: Finished difference Result 2575 states and 7311 transitions. [2021-06-12 19:45:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:45:09,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:09,719 INFO L225 Difference]: With dead ends: 2575 [2021-06-12 19:45:09,720 INFO L226 Difference]: Without dead ends: 2561 [2021-06-12 19:45:09,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:45:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-12 19:45:09,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2203. [2021-06-12 19:45:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9432334241598546) internal successors, (6481), 2202 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6481 transitions. [2021-06-12 19:45:09,742 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6481 transitions. Word has length 21 [2021-06-12 19:45:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:09,742 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6481 transitions. [2021-06-12 19:45:09,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:09,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6481 transitions. [2021-06-12 19:45:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:09,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:09,744 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:09,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39687,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:09,944 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:09,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:09,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1962129368, now seen corresponding path program 381 times [2021-06-12 19:45:09,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:09,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781997604] [2021-06-12 19:45:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:10,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:10,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781997604] [2021-06-12 19:45:10,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781997604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:10,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706581764] [2021-06-12 19:45:10,018 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 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 [2021-06-12 19:45:10,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:45:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:10,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706581764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:10,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:10,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:10,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203177714] [2021-06-12 19:45:10,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:10,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:10,095 INFO L87 Difference]: Start difference. First operand 2203 states and 6481 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:10,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:10,322 INFO L93 Difference]: Finished difference Result 2783 states and 7906 transitions. [2021-06-12 19:45:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:45:10,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:10,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:10,325 INFO L225 Difference]: With dead ends: 2783 [2021-06-12 19:45:10,325 INFO L226 Difference]: Without dead ends: 2783 [2021-06-12 19:45:10,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:45:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-12 19:45:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2246. [2021-06-12 19:45:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 2.9469933184855233) internal successors, (6616), 2245 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 6616 transitions. [2021-06-12 19:45:10,349 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 6616 transitions. Word has length 21 [2021-06-12 19:45:10,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:10,349 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 6616 transitions. [2021-06-12 19:45:10,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 6616 transitions. [2021-06-12 19:45:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:10,351 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:10,351 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:10,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39688 [2021-06-12 19:45:10,552 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1611155303, now seen corresponding path program 382 times [2021-06-12 19:45:10,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:10,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518242209] [2021-06-12 19:45:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:10,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:10,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518242209] [2021-06-12 19:45:10,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518242209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:10,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129525450] [2021-06-12 19:45:10,655 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 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 [2021-06-12 19:45:10,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:10,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:10,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:10,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:10,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129525450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:10,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:10,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:10,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568389022] [2021-06-12 19:45:10,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:10,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:10,721 INFO L87 Difference]: Start difference. First operand 2246 states and 6616 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:10,868 INFO L93 Difference]: Finished difference Result 2809 states and 7847 transitions. [2021-06-12 19:45:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:45:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:10,871 INFO L225 Difference]: With dead ends: 2809 [2021-06-12 19:45:10,871 INFO L226 Difference]: Without dead ends: 2795 [2021-06-12 19:45:10,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:45:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-06-12 19:45:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2250. [2021-06-12 19:45:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 2.94619831036016) internal successors, (6626), 2249 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 6626 transitions. [2021-06-12 19:45:10,894 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 6626 transitions. Word has length 21 [2021-06-12 19:45:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:10,894 INFO L482 AbstractCegarLoop]: Abstraction has 2250 states and 6626 transitions. [2021-06-12 19:45:10,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 6626 transitions. [2021-06-12 19:45:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:10,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:10,896 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:11,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39689 [2021-06-12 19:45:11,097 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:11,097 INFO L82 PathProgramCache]: Analyzing trace with hash 202838706, now seen corresponding path program 383 times [2021-06-12 19:45:11,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:11,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471498046] [2021-06-12 19:45:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:11,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471498046] [2021-06-12 19:45:11,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471498046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491567741] [2021-06-12 19:45:11,156 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 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 [2021-06-12 19:45:11,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:11,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:11,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:11,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:11,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491567741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:11,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:11,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:11,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77399912] [2021-06-12 19:45:11,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:11,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:11,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:11,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:11,227 INFO L87 Difference]: Start difference. First operand 2250 states and 6626 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:11,423 INFO L93 Difference]: Finished difference Result 2507 states and 7160 transitions. [2021-06-12 19:45:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:11,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:11,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:11,426 INFO L225 Difference]: With dead ends: 2507 [2021-06-12 19:45:11,426 INFO L226 Difference]: Without dead ends: 2507 [2021-06-12 19:45:11,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:45:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-12 19:45:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2256. [2021-06-12 19:45:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.946341463414634) internal successors, (6644), 2255 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6644 transitions. [2021-06-12 19:45:11,450 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6644 transitions. Word has length 21 [2021-06-12 19:45:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:11,450 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6644 transitions. [2021-06-12 19:45:11,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6644 transitions. [2021-06-12 19:45:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:11,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:11,452 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:11,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39690 [2021-06-12 19:45:11,653 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1566443093, now seen corresponding path program 384 times [2021-06-12 19:45:11,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:11,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137321882] [2021-06-12 19:45:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:11,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:11,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137321882] [2021-06-12 19:45:11,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137321882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:11,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316121906] [2021-06-12 19:45:11,713 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 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 [2021-06-12 19:45:11,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:45:11,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:11,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:11,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316121906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:11,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:11,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:11,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650539770] [2021-06-12 19:45:11,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:11,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:11,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:11,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:11,774 INFO L87 Difference]: Start difference. First operand 2256 states and 6644 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:11,851 INFO L93 Difference]: Finished difference Result 2564 states and 7327 transitions. [2021-06-12 19:45:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:45:11,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:11,854 INFO L225 Difference]: With dead ends: 2564 [2021-06-12 19:45:11,854 INFO L226 Difference]: Without dead ends: 2548 [2021-06-12 19:45:11,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:45:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-12 19:45:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2256. [2021-06-12 19:45:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.9458980044345897) internal successors, (6643), 2255 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6643 transitions. [2021-06-12 19:45:11,878 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6643 transitions. Word has length 21 [2021-06-12 19:45:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:11,878 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6643 transitions. [2021-06-12 19:45:11,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6643 transitions. [2021-06-12 19:45:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:11,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:11,880 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:12,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39691,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:12,081 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:12,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1947202712, now seen corresponding path program 385 times [2021-06-12 19:45:12,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:12,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469227225] [2021-06-12 19:45:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:12,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:12,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469227225] [2021-06-12 19:45:12,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469227225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:12,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279729660] [2021-06-12 19:45:12,167 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 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 [2021-06-12 19:45:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:12,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:12,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:12,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279729660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:12,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:12,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:12,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280397287] [2021-06-12 19:45:12,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:12,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:12,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:12,233 INFO L87 Difference]: Start difference. First operand 2256 states and 6643 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:12,464 INFO L93 Difference]: Finished difference Result 2604 states and 7425 transitions. [2021-06-12 19:45:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:45:12,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:12,467 INFO L225 Difference]: With dead ends: 2604 [2021-06-12 19:45:12,467 INFO L226 Difference]: Without dead ends: 2604 [2021-06-12 19:45:12,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:45:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-12 19:45:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2270. [2021-06-12 19:45:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 2.9457910973997357) internal successors, (6684), 2269 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 6684 transitions. [2021-06-12 19:45:12,495 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 6684 transitions. Word has length 21 [2021-06-12 19:45:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:12,495 INFO L482 AbstractCegarLoop]: Abstraction has 2270 states and 6684 transitions. [2021-06-12 19:45:12,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 6684 transitions. [2021-06-12 19:45:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:12,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:12,497 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:12,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39692,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:12,698 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:12,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:12,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1278888389, now seen corresponding path program 386 times [2021-06-12 19:45:12,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:12,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865456267] [2021-06-12 19:45:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:12,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:12,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865456267] [2021-06-12 19:45:12,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865456267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:12,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280552661] [2021-06-12 19:45:12,744 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 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 [2021-06-12 19:45:12,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:12,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:12,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:12,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280552661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:12,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:12,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:12,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488233383] [2021-06-12 19:45:12,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:12,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:12,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:12,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:12,815 INFO L87 Difference]: Start difference. First operand 2270 states and 6684 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:12,900 INFO L93 Difference]: Finished difference Result 2879 states and 8100 transitions. [2021-06-12 19:45:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:45:12,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:12,905 INFO L225 Difference]: With dead ends: 2879 [2021-06-12 19:45:12,905 INFO L226 Difference]: Without dead ends: 2879 [2021-06-12 19:45:12,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-06-12 19:45:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2519. [2021-06-12 19:45:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 2.9785544082605244) internal successors, (7500), 2518 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:12,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7500 transitions. [2021-06-12 19:45:12,935 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7500 transitions. Word has length 21 [2021-06-12 19:45:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:12,935 INFO L482 AbstractCegarLoop]: Abstraction has 2519 states and 7500 transitions. [2021-06-12 19:45:12,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7500 transitions. [2021-06-12 19:45:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:12,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:12,937 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:13,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39693,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:13,149 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:13,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1197758104, now seen corresponding path program 387 times [2021-06-12 19:45:13,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:13,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075922998] [2021-06-12 19:45:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:13,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:13,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075922998] [2021-06-12 19:45:13,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075922998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:13,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075269984] [2021-06-12 19:45:13,222 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 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 [2021-06-12 19:45:13,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:45:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:13,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075269984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:13,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:13,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:13,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827086495] [2021-06-12 19:45:13,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:13,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:13,279 INFO L87 Difference]: Start difference. First operand 2519 states and 7500 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:13,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:13,446 INFO L93 Difference]: Finished difference Result 2785 states and 7952 transitions. [2021-06-12 19:45:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:45:13,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:13,449 INFO L225 Difference]: With dead ends: 2785 [2021-06-12 19:45:13,449 INFO L226 Difference]: Without dead ends: 2783 [2021-06-12 19:45:13,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:45:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-12 19:45:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2541. [2021-06-12 19:45:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.984645669291339) internal successors, (7581), 2540 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7581 transitions. [2021-06-12 19:45:13,475 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7581 transitions. Word has length 21 [2021-06-12 19:45:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:13,475 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7581 transitions. [2021-06-12 19:45:13,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7581 transitions. [2021-06-12 19:45:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:13,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:13,477 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:13,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39694,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:13,678 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash 315839103, now seen corresponding path program 388 times [2021-06-12 19:45:13,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:13,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164257031] [2021-06-12 19:45:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:13,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:13,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164257031] [2021-06-12 19:45:13,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164257031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:13,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782678493] [2021-06-12 19:45:13,737 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 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 [2021-06-12 19:45:13,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:13,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:13,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:13,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:13,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782678493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:13,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:13,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:13,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259724717] [2021-06-12 19:45:13,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:13,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:13,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:13,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:13,796 INFO L87 Difference]: Start difference. First operand 2541 states and 7581 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:13,946 INFO L93 Difference]: Finished difference Result 2878 states and 8139 transitions. [2021-06-12 19:45:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:45:13,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:13,949 INFO L225 Difference]: With dead ends: 2878 [2021-06-12 19:45:13,949 INFO L226 Difference]: Without dead ends: 2876 [2021-06-12 19:45:13,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:45:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-12 19:45:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2523. [2021-06-12 19:45:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 2.978191911181602) internal successors, (7511), 2522 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 7511 transitions. [2021-06-12 19:45:13,978 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 7511 transitions. Word has length 21 [2021-06-12 19:45:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:13,978 INFO L482 AbstractCegarLoop]: Abstraction has 2523 states and 7511 transitions. [2021-06-12 19:45:13,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 7511 transitions. [2021-06-12 19:45:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:13,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:13,980 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:14,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39695 [2021-06-12 19:45:14,181 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash -345424680, now seen corresponding path program 389 times [2021-06-12 19:45:14,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:14,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603082806] [2021-06-12 19:45:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:14,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:14,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603082806] [2021-06-12 19:45:14,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603082806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:14,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408459110] [2021-06-12 19:45:14,242 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 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 [2021-06-12 19:45:14,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:45:14,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:14,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:14,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408459110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:14,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:14,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:14,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638698282] [2021-06-12 19:45:14,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:14,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:14,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:14,308 INFO L87 Difference]: Start difference. First operand 2523 states and 7511 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:14,409 INFO L93 Difference]: Finished difference Result 2854 states and 8107 transitions. [2021-06-12 19:45:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:45:14,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:14,413 INFO L225 Difference]: With dead ends: 2854 [2021-06-12 19:45:14,413 INFO L226 Difference]: Without dead ends: 2854 [2021-06-12 19:45:14,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:45:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-12 19:45:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2529. [2021-06-12 19:45:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.978243670886076) internal successors, (7529), 2528 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7529 transitions. [2021-06-12 19:45:14,441 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7529 transitions. Word has length 21 [2021-06-12 19:45:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:14,441 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7529 transitions. [2021-06-12 19:45:14,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7529 transitions. [2021-06-12 19:45:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:14,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:14,443 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:14,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39696,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:14,651 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:14,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:14,651 INFO L82 PathProgramCache]: Analyzing trace with hash 931503419, now seen corresponding path program 390 times [2021-06-12 19:45:14,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:14,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389055411] [2021-06-12 19:45:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:14,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389055411] [2021-06-12 19:45:14,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389055411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740467264] [2021-06-12 19:45:14,698 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 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 [2021-06-12 19:45:14,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:45:14,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:14,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:14,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:14,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740467264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:14,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:14,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:14,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574005635] [2021-06-12 19:45:14,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:14,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:14,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:14,751 INFO L87 Difference]: Start difference. First operand 2529 states and 7529 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:14,882 INFO L93 Difference]: Finished difference Result 2971 states and 8408 transitions. [2021-06-12 19:45:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:45:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:14,885 INFO L225 Difference]: With dead ends: 2971 [2021-06-12 19:45:14,885 INFO L226 Difference]: Without dead ends: 2967 [2021-06-12 19:45:14,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:45:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-06-12 19:45:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2529. [2021-06-12 19:45:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.9778481012658227) internal successors, (7528), 2528 states have internal predecessors, (7528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7528 transitions. [2021-06-12 19:45:14,912 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7528 transitions. Word has length 21 [2021-06-12 19:45:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:14,912 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7528 transitions. [2021-06-12 19:45:14,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7528 transitions. [2021-06-12 19:45:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:14,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:14,914 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:15,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39697,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:15,115 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1888682814, now seen corresponding path program 391 times [2021-06-12 19:45:15,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:15,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825821318] [2021-06-12 19:45:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:15,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:15,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825821318] [2021-06-12 19:45:15,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825821318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:15,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170945508] [2021-06-12 19:45:15,162 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 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 [2021-06-12 19:45:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:15,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:15,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:15,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170945508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:15,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:15,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:15,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771652582] [2021-06-12 19:45:15,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:15,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:15,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:15,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:15,225 INFO L87 Difference]: Start difference. First operand 2529 states and 7528 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:15,356 INFO L93 Difference]: Finished difference Result 2883 states and 8203 transitions. [2021-06-12 19:45:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:45:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:15,359 INFO L225 Difference]: With dead ends: 2883 [2021-06-12 19:45:15,359 INFO L226 Difference]: Without dead ends: 2883 [2021-06-12 19:45:15,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:45:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-06-12 19:45:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2549. [2021-06-12 19:45:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.9803767660910516) internal successors, (7594), 2548 states have internal predecessors, (7594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7594 transitions. [2021-06-12 19:45:15,389 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7594 transitions. Word has length 21 [2021-06-12 19:45:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:15,389 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7594 transitions. [2021-06-12 19:45:15,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:15,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7594 transitions. [2021-06-12 19:45:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:15,391 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:15,391 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:15,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39698,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:15,591 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:15,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:15,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1457739265, now seen corresponding path program 392 times [2021-06-12 19:45:15,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:15,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939924183] [2021-06-12 19:45:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:15,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:15,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939924183] [2021-06-12 19:45:15,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939924183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:15,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062950362] [2021-06-12 19:45:15,637 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 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 [2021-06-12 19:45:15,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:15,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:15,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:15,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:15,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062950362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:15,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:15,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:45:15,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005561242] [2021-06-12 19:45:15,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:45:15,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:15,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:45:15,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:45:15,690 INFO L87 Difference]: Start difference. First operand 2549 states and 7594 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:15,822 INFO L93 Difference]: Finished difference Result 2952 states and 8363 transitions. [2021-06-12 19:45:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-12 19:45:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:15,825 INFO L225 Difference]: With dead ends: 2952 [2021-06-12 19:45:15,825 INFO L226 Difference]: Without dead ends: 2946 [2021-06-12 19:45:15,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:45:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-06-12 19:45:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2549. [2021-06-12 19:45:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.979984301412873) internal successors, (7593), 2548 states have internal predecessors, (7593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7593 transitions. [2021-06-12 19:45:15,855 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7593 transitions. Word has length 21 [2021-06-12 19:45:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:15,855 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7593 transitions. [2021-06-12 19:45:15,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2021-06-12 19:45:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7593 transitions. [2021-06-12 19:45:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:15,857 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:15,858 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:16,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39699,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:16,058 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:16,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1785148859, now seen corresponding path program 393 times [2021-06-12 19:45:16,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:16,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489948887] [2021-06-12 19:45:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:16,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:16,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489948887] [2021-06-12 19:45:16,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489948887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:16,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511166793] [2021-06-12 19:45:16,104 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 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 [2021-06-12 19:45:16,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:45:16,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:16,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511166793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:16,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:16,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:16,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515467832] [2021-06-12 19:45:16,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:16,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:16,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:16,167 INFO L87 Difference]: Start difference. First operand 2549 states and 7593 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:16,307 INFO L93 Difference]: Finished difference Result 2990 states and 8433 transitions. [2021-06-12 19:45:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:45:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:16,310 INFO L225 Difference]: With dead ends: 2990 [2021-06-12 19:45:16,310 INFO L226 Difference]: Without dead ends: 2982 [2021-06-12 19:45:16,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:45:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-06-12 19:45:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2581. [2021-06-12 19:45:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2580 states have (on average 2.9864341085271318) internal successors, (7705), 2580 states have internal predecessors, (7705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 7705 transitions. [2021-06-12 19:45:16,339 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 7705 transitions. Word has length 21 [2021-06-12 19:45:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:16,339 INFO L482 AbstractCegarLoop]: Abstraction has 2581 states and 7705 transitions. [2021-06-12 19:45:16,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 7705 transitions. [2021-06-12 19:45:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:16,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:16,342 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:16,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39700 [2021-06-12 19:45:16,542 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:16,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1920192126, now seen corresponding path program 394 times [2021-06-12 19:45:16,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:16,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185813850] [2021-06-12 19:45:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:16,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:16,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185813850] [2021-06-12 19:45:16,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185813850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:16,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165290146] [2021-06-12 19:45:16,592 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 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 [2021-06-12 19:45:16,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:16,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:16,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:16,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:16,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165290146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:16,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:16,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636317788] [2021-06-12 19:45:16,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:16,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:16,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:16,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:16,654 INFO L87 Difference]: Start difference. First operand 2581 states and 7705 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:16,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:16,796 INFO L93 Difference]: Finished difference Result 2910 states and 8395 transitions. [2021-06-12 19:45:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:45:16,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:16,799 INFO L225 Difference]: With dead ends: 2910 [2021-06-12 19:45:16,799 INFO L226 Difference]: Without dead ends: 2910 [2021-06-12 19:45:16,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-12 19:45:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2663. [2021-06-12 19:45:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 2.989105935386927) internal successors, (7957), 2662 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 7957 transitions. [2021-06-12 19:45:16,825 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 7957 transitions. Word has length 21 [2021-06-12 19:45:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:16,825 INFO L482 AbstractCegarLoop]: Abstraction has 2663 states and 7957 transitions. [2021-06-12 19:45:16,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 7957 transitions. [2021-06-12 19:45:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:16,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:16,827 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:17,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39701,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:17,028 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash -764534401, now seen corresponding path program 395 times [2021-06-12 19:45:17,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:17,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338344089] [2021-06-12 19:45:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:17,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:17,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338344089] [2021-06-12 19:45:17,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338344089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:17,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968701955] [2021-06-12 19:45:17,083 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 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 [2021-06-12 19:45:17,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:45:17,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:17,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:17,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:17,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968701955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:17,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:17,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:17,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611581469] [2021-06-12 19:45:17,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:17,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:17,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:17,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:17,145 INFO L87 Difference]: Start difference. First operand 2663 states and 7957 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:17,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:17,286 INFO L93 Difference]: Finished difference Result 3615 states and 10212 transitions. [2021-06-12 19:45:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:17,287 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:17,291 INFO L225 Difference]: With dead ends: 3615 [2021-06-12 19:45:17,291 INFO L226 Difference]: Without dead ends: 3605 [2021-06-12 19:45:17,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:45:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-06-12 19:45:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2661. [2021-06-12 19:45:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.9890977443609024) internal successors, (7951), 2660 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7951 transitions. [2021-06-12 19:45:17,324 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7951 transitions. Word has length 21 [2021-06-12 19:45:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:17,324 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 7951 transitions. [2021-06-12 19:45:17,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7951 transitions. [2021-06-12 19:45:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:17,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:17,326 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:17,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39702 [2021-06-12 19:45:17,527 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:17,527 INFO L82 PathProgramCache]: Analyzing trace with hash -891640232, now seen corresponding path program 396 times [2021-06-12 19:45:17,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:17,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903806388] [2021-06-12 19:45:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:17,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:17,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903806388] [2021-06-12 19:45:17,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903806388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:17,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364944557] [2021-06-12 19:45:17,576 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 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 [2021-06-12 19:45:17,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:45:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:17,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:17,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:17,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364944557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:17,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:17,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:17,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919385967] [2021-06-12 19:45:17,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:17,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:17,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:17,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:17,637 INFO L87 Difference]: Start difference. First operand 2661 states and 7951 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:17,764 INFO L93 Difference]: Finished difference Result 3050 states and 8892 transitions. [2021-06-12 19:45:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:45:17,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:17,768 INFO L225 Difference]: With dead ends: 3050 [2021-06-12 19:45:17,768 INFO L226 Difference]: Without dead ends: 3050 [2021-06-12 19:45:17,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:45:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-06-12 19:45:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 2842. [2021-06-12 19:45:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9922562478000705) internal successors, (8501), 2841 states have internal predecessors, (8501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8501 transitions. [2021-06-12 19:45:17,816 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8501 transitions. Word has length 21 [2021-06-12 19:45:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:17,816 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8501 transitions. [2021-06-12 19:45:17,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8501 transitions. [2021-06-12 19:45:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:17,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:17,819 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:18,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39703 [2021-06-12 19:45:18,019 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:18,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:18,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1799663163, now seen corresponding path program 397 times [2021-06-12 19:45:18,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:18,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357954356] [2021-06-12 19:45:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:18,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:18,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357954356] [2021-06-12 19:45:18,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357954356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:18,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000406102] [2021-06-12 19:45:18,076 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 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 [2021-06-12 19:45:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:18,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:18,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000406102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:18,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:18,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:18,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678105440] [2021-06-12 19:45:18,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:18,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:18,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:18,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:18,133 INFO L87 Difference]: Start difference. First operand 2842 states and 8501 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:18,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:18,267 INFO L93 Difference]: Finished difference Result 3614 states and 10275 transitions. [2021-06-12 19:45:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:45:18,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:18,271 INFO L225 Difference]: With dead ends: 3614 [2021-06-12 19:45:18,271 INFO L226 Difference]: Without dead ends: 3602 [2021-06-12 19:45:18,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:45:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-06-12 19:45:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 2842. [2021-06-12 19:45:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9915522703273494) internal successors, (8499), 2841 states have internal predecessors, (8499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8499 transitions. [2021-06-12 19:45:18,303 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8499 transitions. Word has length 21 [2021-06-12 19:45:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:18,304 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8499 transitions. [2021-06-12 19:45:18,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8499 transitions. [2021-06-12 19:45:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:18,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:18,306 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:18,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39704 [2021-06-12 19:45:18,513 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2135869886, now seen corresponding path program 398 times [2021-06-12 19:45:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:18,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198856140] [2021-06-12 19:45:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:18,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:18,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198856140] [2021-06-12 19:45:18,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198856140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:18,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087726769] [2021-06-12 19:45:18,564 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 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 [2021-06-12 19:45:18,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:18,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:45:18,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087726769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:18,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:18,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-12 19:45:18,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623762535] [2021-06-12 19:45:18,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:45:18,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:18,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:45:18,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:45:18,639 INFO L87 Difference]: Start difference. First operand 2842 states and 8499 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:18,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:18,758 INFO L93 Difference]: Finished difference Result 2996 states and 8829 transitions. [2021-06-12 19:45:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:45:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-12 19:45:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:18,762 INFO L225 Difference]: With dead ends: 2996 [2021-06-12 19:45:18,762 INFO L226 Difference]: Without dead ends: 2996 [2021-06-12 19:45:18,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:45:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2021-06-12 19:45:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2879. [2021-06-12 19:45:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.991660875608061) internal successors, (8610), 2878 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:18,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 8610 transitions. [2021-06-12 19:45:18,801 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 8610 transitions. Word has length 21 [2021-06-12 19:45:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:18,802 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 8610 transitions. [2021-06-12 19:45:18,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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) [2021-06-12 19:45:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 8610 transitions. [2021-06-12 19:45:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:18,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:18,805 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:19,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39705 [2021-06-12 19:45:19,017 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash -314590977, now seen corresponding path program 399 times [2021-06-12 19:45:19,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:19,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435582744] [2021-06-12 19:45:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:19,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:19,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435582744] [2021-06-12 19:45:19,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435582744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:19,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964350778] [2021-06-12 19:45:19,076 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 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 [2021-06-12 19:45:19,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:45:19,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:19,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964350778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:19,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:19,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:19,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96933295] [2021-06-12 19:45:19,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:19,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:19,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:19,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:19,141 INFO L87 Difference]: Start difference. First operand 2879 states and 8610 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:19,282 INFO L93 Difference]: Finished difference Result 3624 states and 10338 transitions. [2021-06-12 19:45:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:45:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:19,285 INFO L225 Difference]: With dead ends: 3624 [2021-06-12 19:45:19,285 INFO L226 Difference]: Without dead ends: 3610 [2021-06-12 19:45:19,285 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-06-12 19:45:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2900. [2021-06-12 19:45:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 2.9913763366678165) internal successors, (8672), 2899 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 8672 transitions. [2021-06-12 19:45:19,318 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 8672 transitions. Word has length 21 [2021-06-12 19:45:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:19,318 INFO L482 AbstractCegarLoop]: Abstraction has 2900 states and 8672 transitions. [2021-06-12 19:45:19,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 8672 transitions. [2021-06-12 19:45:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:19,321 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:19,321 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:19,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39706,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:19,521 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1499403032, now seen corresponding path program 400 times [2021-06-12 19:45:19,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:19,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839396728] [2021-06-12 19:45:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:19,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:19,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839396728] [2021-06-12 19:45:19,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839396728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:19,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602931509] [2021-06-12 19:45:19,584 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 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 [2021-06-12 19:45:19,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:19,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:19,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:19,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602931509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:19,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:19,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:19,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043317702] [2021-06-12 19:45:19,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:19,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:19,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:19,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:19,644 INFO L87 Difference]: Start difference. First operand 2900 states and 8672 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:19,784 INFO L93 Difference]: Finished difference Result 3081 states and 9020 transitions. [2021-06-12 19:45:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:45:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:19,788 INFO L225 Difference]: With dead ends: 3081 [2021-06-12 19:45:19,788 INFO L226 Difference]: Without dead ends: 3081 [2021-06-12 19:45:19,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:45:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-06-12 19:45:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2899. [2021-06-12 19:45:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9913733609385784) internal successors, (8669), 2898 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8669 transitions. [2021-06-12 19:45:19,823 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8669 transitions. Word has length 21 [2021-06-12 19:45:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:19,823 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8669 transitions. [2021-06-12 19:45:19,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8669 transitions. [2021-06-12 19:45:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:19,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:19,826 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:20,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39707 [2021-06-12 19:45:20,026 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:20,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:20,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1431959877, now seen corresponding path program 401 times [2021-06-12 19:45:20,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:20,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391339254] [2021-06-12 19:45:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:20,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:20,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391339254] [2021-06-12 19:45:20,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391339254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:20,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170067235] [2021-06-12 19:45:20,085 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 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 [2021-06-12 19:45:20,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:45:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:20,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170067235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:20,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:20,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:20,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947141127] [2021-06-12 19:45:20,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:20,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:20,143 INFO L87 Difference]: Start difference. First operand 2899 states and 8669 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:20,221 INFO L93 Difference]: Finished difference Result 3250 states and 9452 transitions. [2021-06-12 19:45:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:45:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:20,225 INFO L225 Difference]: With dead ends: 3250 [2021-06-12 19:45:20,225 INFO L226 Difference]: Without dead ends: 3234 [2021-06-12 19:45:20,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:45:20,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-06-12 19:45:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2899. [2021-06-12 19:45:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9910282953761214) internal successors, (8668), 2898 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8668 transitions. [2021-06-12 19:45:20,256 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8668 transitions. Word has length 21 [2021-06-12 19:45:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:20,256 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8668 transitions. [2021-06-12 19:45:20,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8668 transitions. [2021-06-12 19:45:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:20,259 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:20,259 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:20,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39708,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:20,461 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:20,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:20,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1051200258, now seen corresponding path program 402 times [2021-06-12 19:45:20,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:20,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114496583] [2021-06-12 19:45:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:20,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:20,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114496583] [2021-06-12 19:45:20,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114496583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:20,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041853686] [2021-06-12 19:45:20,524 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 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 [2021-06-12 19:45:20,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:45:20,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:20,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:20,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041853686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:20,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:20,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:20,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679053175] [2021-06-12 19:45:20,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:20,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:20,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:20,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:20,587 INFO L87 Difference]: Start difference. First operand 2899 states and 8668 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:20,766 INFO L93 Difference]: Finished difference Result 3186 states and 9298 transitions. [2021-06-12 19:45:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:45:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:20,769 INFO L225 Difference]: With dead ends: 3186 [2021-06-12 19:45:20,770 INFO L226 Difference]: Without dead ends: 3186 [2021-06-12 19:45:20,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:45:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-06-12 19:45:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2911. [2021-06-12 19:45:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 2.99106529209622) internal successors, (8704), 2910 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 8704 transitions. [2021-06-12 19:45:20,799 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 8704 transitions. Word has length 21 [2021-06-12 19:45:20,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:20,800 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 8704 transitions. [2021-06-12 19:45:20,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:20,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 8704 transitions. [2021-06-12 19:45:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:20,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:20,802 INFO L472 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:21,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39709,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:45:21,002 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1710657409, now seen corresponding path program 403 times [2021-06-12 19:45:21,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:21,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914556494] [2021-06-12 19:45:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:21,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914556494] [2021-06-12 19:45:21,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914556494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:21,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122598549] [2021-06-12 19:45:21,067 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 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 [2021-06-12 19:45:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:21,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:21,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122598549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:21,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:21,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:21,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564733452] [2021-06-12 19:45:21,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:21,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:21,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:21,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:21,125 INFO L87 Difference]: Start difference. First operand 2911 states and 8704 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:21,195 INFO L93 Difference]: Finished difference Result 3241 states and 9439 transitions. [2021-06-12 19:45:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:45:21,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:21,199 INFO L225 Difference]: With dead ends: 3241 [2021-06-12 19:45:21,199 INFO L226 Difference]: Without dead ends: 3223 [2021-06-12 19:45:21,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:45:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-06-12 19:45:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 2909. [2021-06-12 19:45:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2908 states have (on average 2.9917469050894083) internal successors, (8700), 2908 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 8700 transitions. [2021-06-12 19:45:21,229 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 8700 transitions. Word has length 21 [2021-06-12 19:45:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:21,229 INFO L482 AbstractCegarLoop]: Abstraction has 2909 states and 8700 transitions. [2021-06-12 19:45:21,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 8700 transitions. [2021-06-12 19:45:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 19:45:21,232 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:21,232 INFO L472 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:21,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39710 [2021-06-12 19:45:21,432 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:21,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1484476376, now seen corresponding path program 404 times [2021-06-12 19:45:21,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:21,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203167759] [2021-06-12 19:45:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:21,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203167759] [2021-06-12 19:45:21,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203167759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638285749] [2021-06-12 19:45:21,498 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 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 [2021-06-12 19:45:21,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:45:21,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:21,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:45:21,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:21,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638285749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:21,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:21,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-12 19:45:21,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523622635] [2021-06-12 19:45:21,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:45:21,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:21,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:45:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:45:21,561 INFO L87 Difference]: Start difference. First operand 2909 states and 8700 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:21,768 INFO L93 Difference]: Finished difference Result 3418 states and 9945 transitions. [2021-06-12 19:45:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:45:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-12 19:45:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:21,771 INFO L225 Difference]: With dead ends: 3418 [2021-06-12 19:45:21,771 INFO L226 Difference]: Without dead ends: 3418 [2021-06-12 19:45:21,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:45:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-06-12 19:45:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2927. [2021-06-12 19:45:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.9907723855092274) internal successors, (8751), 2926 states have internal predecessors, (8751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 8751 transitions. [2021-06-12 19:45:21,805 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 8751 transitions. Word has length 21 [2021-06-12 19:45:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:21,806 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 8751 transitions. [2021-06-12 19:45:21,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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) [2021-06-12 19:45:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 8751 transitions. [2021-06-12 19:45:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:21,808 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:21,808 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:22,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39711 [2021-06-12 19:45:22,013 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash -857679500, now seen corresponding path program 405 times [2021-06-12 19:45:22,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:22,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037324018] [2021-06-12 19:45:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:22,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:22,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037324018] [2021-06-12 19:45:22,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037324018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:22,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126471455] [2021-06-12 19:45:22,176 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 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 [2021-06-12 19:45:22,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:45:22,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:22,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:45:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:22,706 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:45:22,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:45:22,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:45:24,132 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 427 [2021-06-12 19:45:24,428 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-06-12 19:45:24,743 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-06-12 19:45:25,088 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 511 [2021-06-12 19:45:25,482 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 538 [2021-06-12 19:45:25,770 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 305 [2021-06-12 19:45:26,459 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-06-12 19:45:26,682 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-06-12 19:45:26,961 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 402 [2021-06-12 19:45:27,145 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 417 [2021-06-12 19:45:27,255 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 392 [2021-06-12 19:45:27,508 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 353 [2021-06-12 19:45:28,074 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 222 [2021-06-12 19:45:28,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:45:28,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:45:28,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:45:28,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-12 19:45:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:28,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126471455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:28,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:28,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 19:45:28,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336231657] [2021-06-12 19:45:28,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 19:45:28,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:28,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 19:45:28,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:45:28,914 INFO L87 Difference]: Start difference. First operand 2927 states and 8751 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:29,355 INFO L93 Difference]: Finished difference Result 3024 states and 8948 transitions. [2021-06-12 19:45:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:45:29,356 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:29,359 INFO L225 Difference]: With dead ends: 3024 [2021-06-12 19:45:29,359 INFO L226 Difference]: Without dead ends: 2991 [2021-06-12 19:45:29,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:45:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-12 19:45:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2948. [2021-06-12 19:45:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 2.98982015609094) internal successors, (8811), 2947 states have internal predecessors, (8811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 8811 transitions. [2021-06-12 19:45:29,387 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 8811 transitions. Word has length 22 [2021-06-12 19:45:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:29,387 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 8811 transitions. [2021-06-12 19:45:29,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 8811 transitions. [2021-06-12 19:45:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:29,389 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:29,389 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:29,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39712 [2021-06-12 19:45:29,590 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash -599146780, now seen corresponding path program 406 times [2021-06-12 19:45:29,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:29,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594050519] [2021-06-12 19:45:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:29,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:29,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594050519] [2021-06-12 19:45:29,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594050519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:29,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709598604] [2021-06-12 19:45:29,710 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 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 [2021-06-12 19:45:29,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:45:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:29,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:45:29,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:30,237 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:45:30,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:45:30,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:45:31,260 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 289 [2021-06-12 19:45:31,442 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-06-12 19:45:31,640 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-06-12 19:45:31,840 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 317 [2021-06-12 19:45:31,961 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 324 [2021-06-12 19:45:32,298 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 400 [2021-06-12 19:45:32,495 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 291 [2021-06-12 19:45:32,675 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 292 [2021-06-12 19:45:33,206 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 216 [2021-06-12 19:45:33,397 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 243 [2021-06-12 19:45:33,653 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 337 [2021-06-12 19:45:33,929 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-06-12 19:45:34,207 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-06-12 19:45:34,520 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 364 [2021-06-12 19:45:34,761 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 368 [2021-06-12 19:45:34,864 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 300 [2021-06-12 19:45:35,664 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 236 [2021-06-12 19:45:35,787 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 254 [2021-06-12 19:45:37,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:45:37,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:45:37,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:45:37,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-12 19:45:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:37,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709598604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:37,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:45:37,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 19:45:37,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556029103] [2021-06-12 19:45:37,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:45:37,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:45:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:45:37,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:45:37,158 INFO L87 Difference]: Start difference. First operand 2948 states and 8811 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:45:37,500 INFO L93 Difference]: Finished difference Result 3054 states and 9036 transitions. [2021-06-12 19:45:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:45:37,501 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:45:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:45:37,504 INFO L225 Difference]: With dead ends: 3054 [2021-06-12 19:45:37,504 INFO L226 Difference]: Without dead ends: 3038 [2021-06-12 19:45:37,505 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:45:37,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-06-12 19:45:37,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2970. [2021-06-12 19:45:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-06-12 19:45:37,536 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-06-12 19:45:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:45:37,536 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-06-12 19:45:37,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:45:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-06-12 19:45:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:45:37,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:45:37,538 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:45:37,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40164 [2021-06-12 19:45:37,739 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:45:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:45:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash 144436580, now seen corresponding path program 407 times [2021-06-12 19:45:37,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:45:37,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563499605] [2021-06-12 19:45:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:45:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:45:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:45:37,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:45:37,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563499605] [2021-06-12 19:45:37,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563499605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:45:37,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336746285] [2021-06-12 19:45:37,853 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 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 [2021-06-12 19:45:37,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:45:37,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:45:37,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:45:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:45:38,315 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:45:38,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:45:38,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:45:39,125 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 344 [2021-06-12 19:45:39,829 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 328 [2021-06-12 19:45:40,174 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-06-12 19:45:40,495 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-06-12 19:45:40,907 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 577 [2021-06-12 19:45:41,527 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 742 [2021-06-12 19:45:41,807 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 273 [2021-06-12 19:45:42,622 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 172 [2021-06-12 19:45:42,749 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 191 [2021-06-12 19:45:42,981 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 290 [2021-06-12 19:45:43,099 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 491 [2021-06-12 19:45:43,344 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 278 [2021-06-12 19:45:44,217 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 278 [2021-06-12 19:45:44,448 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 352 [2021-06-12 19:45:44,564 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 224 [2021-06-12 19:45:45,725 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 324 [2021-06-12 19:45:45,931 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 334 [2021-06-12 19:45:46,223 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 372 [2021-06-12 19:45:46,840 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 906 DAG size of output: 642 [2021-06-12 19:45:47,768 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-06-12 19:45:48,705 WARN L205 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-06-12 19:45:49,717 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1211 DAG size of output: 773 [2021-06-12 19:45:50,343 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 624 [2021-06-12 19:45:50,501 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 418 [2021-06-12 19:45:51,423 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-06-12 19:45:51,570 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-06-12 19:45:51,719 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 252 [2021-06-12 19:45:51,882 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 301 [2021-06-12 19:45:52,268 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 239 [2021-06-12 19:45:53,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:45:53,497 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-12 19:45:53,498 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-12 19:45:53,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-12 19:45:54,303 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-06-12 19:45:54,451 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-06-12 19:45:54,637 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 306 [2021-06-12 19:45:54,879 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 383 [2021-06-12 19:45:55,157 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 377 [2021-06-12 19:45:55,454 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 381 [2021-06-12 19:45:55,630 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 289 [2021-06-12 19:45:56,680 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 191 [2021-06-12 19:45:56,813 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 224 [2021-06-12 19:45:57,832 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 233 [2021-06-12 19:45:58,166 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 375 [2021-06-12 19:45:59,351 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 318 [2021-06-12 19:46:00,376 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 263 [2021-06-12 19:46:00,690 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 424 [2021-06-12 19:46:01,476 WARN L205 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 706 [2021-06-12 19:46:02,409 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 1141 DAG size of output: 726 [2021-06-12 19:46:03,625 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1313 DAG size of output: 869 [2021-06-12 19:46:05,067 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1375 DAG size of output: 917 [2021-06-12 19:46:06,933 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 1507 DAG size of output: 1013 [2021-06-12 19:46:09,138 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-06-12 19:46:11,336 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-06-12 19:46:13,767 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1661 DAG size of output: 1107 [2021-06-12 19:46:17,054 WARN L205 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 1109 DAG size of output: 1377 [2021-06-12 19:46:17,229 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 822 DAG size of output: 752 [2021-06-12 19:46:18,575 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 722 DAG size of output: 745 [2021-06-12 19:46:18,781 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 332 [2021-06-12 19:46:19,444 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 218 [2021-06-12 19:46:19,572 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 237 [2021-06-12 19:46:19,806 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 402 [2021-06-12 19:46:20,408 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 270 [2021-06-12 19:46:20,580 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 281 [2021-06-12 19:46:20,865 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 319 [2021-06-12 19:46:21,169 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 338 [2021-06-12 19:46:21,549 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 410 [2021-06-12 19:46:22,013 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 439 [2021-06-12 19:46:22,185 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 933 [2021-06-12 19:46:22,374 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 865 [2021-06-12 19:46:24,215 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 835 DAG size of output: 1011 [2021-06-12 19:46:24,323 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 695 [2021-06-12 19:46:24,861 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 270 [2021-06-12 19:46:25,300 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 391 [2021-06-12 19:46:25,551 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 395 [2021-06-12 19:46:25,668 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 218 [2021-06-12 19:46:26,207 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 520 [2021-06-12 19:46:26,770 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 800 DAG size of output: 564 [2021-06-12 19:46:27,770 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 284 [2021-06-12 19:46:27,963 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 329 [2021-06-12 19:46:28,605 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 1167 DAG size of output: 654 [2021-06-12 19:46:29,374 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 1198 DAG size of output: 683 [2021-06-12 19:46:30,143 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 1200 DAG size of output: 685 [2021-06-12 19:46:31,417 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-06-12 19:46:32,694 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-06-12 19:46:34,122 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 1643 DAG size of output: 908 [2021-06-12 19:46:35,037 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 910 DAG size of output: 673 [2021-06-12 19:46:35,323 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 324 [2021-06-12 19:46:36,071 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-06-12 19:46:36,294 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-06-12 19:46:36,512 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 324 [2021-06-12 19:46:37,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:46:37,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:46:37,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:46:37,252 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:46:37,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:46:37,253 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-12 19:46:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:37,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336746285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:37,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:37,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 19:46:37,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917283112] [2021-06-12 19:46:37,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:46:37,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:37,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:46:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:46:37,283 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:37,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:37,615 INFO L93 Difference]: Finished difference Result 3077 states and 9090 transitions. [2021-06-12 19:46:37,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:46:37,616 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:37,619 INFO L225 Difference]: With dead ends: 3077 [2021-06-12 19:46:37,619 INFO L226 Difference]: Without dead ends: 3067 [2021-06-12 19:46:37,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:46:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2021-06-12 19:46:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2970. [2021-06-12 19:46:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-06-12 19:46:37,647 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-06-12 19:46:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:37,648 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-06-12 19:46:37,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-06-12 19:46:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:37,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:37,650 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:37,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40835,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:46:37,851 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:37,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:37,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1666470026, now seen corresponding path program 408 times [2021-06-12 19:46:37,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:37,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094039122] [2021-06-12 19:46:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:37,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:37,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094039122] [2021-06-12 19:46:37,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094039122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:37,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865471685] [2021-06-12 19:46:37,960 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 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 [2021-06-12 19:46:37,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:46:37,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:46:37,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:46:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:38,424 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:46:38,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:46:38,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:46:39,167 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-06-12 19:46:39,316 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-06-12 19:46:39,485 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 292 [2021-06-12 19:46:39,767 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 384 [2021-06-12 19:46:40,009 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 295 [2021-06-12 19:46:40,651 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 267 [2021-06-12 19:46:41,067 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 353 [2021-06-12 19:46:41,376 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 448 [2021-06-12 19:46:41,649 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 301 [2021-06-12 19:46:42,503 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 277 [2021-06-12 19:46:42,741 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 280 [2021-06-12 19:46:43,328 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-06-12 19:46:43,913 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-06-12 19:46:44,564 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 602 [2021-06-12 19:46:45,213 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 732 [2021-06-12 19:46:45,526 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 442 [2021-06-12 19:46:45,790 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-06-12 19:46:46,380 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 303 [2021-06-12 19:46:46,627 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 433 [2021-06-12 19:46:46,947 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-06-12 19:46:47,276 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-06-12 19:46:47,634 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 474 [2021-06-12 19:46:47,978 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 410 [2021-06-12 19:46:48,166 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 335 [2021-06-12 19:46:48,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:46:48,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:46:48,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:46:48,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-12 19:46:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:48,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865471685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:48,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:46:48,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 19:46:48,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660418510] [2021-06-12 19:46:48,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:46:48,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:46:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:46:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:46:48,758 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:46:49,255 INFO L93 Difference]: Finished difference Result 3120 states and 9276 transitions. [2021-06-12 19:46:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:46:49,256 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:46:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:46:49,259 INFO L225 Difference]: With dead ends: 3120 [2021-06-12 19:46:49,259 INFO L226 Difference]: Without dead ends: 3104 [2021-06-12 19:46:49,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:46:49,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-12 19:46:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-06-12 19:46:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.004291845493562) internal successors, (9100), 3029 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9100 transitions. [2021-06-12 19:46:49,287 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9100 transitions. Word has length 22 [2021-06-12 19:46:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:46:49,287 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9100 transitions. [2021-06-12 19:46:49,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:46:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9100 transitions. [2021-06-12 19:46:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:46:49,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:46:49,290 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:46:49,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43471 [2021-06-12 19:46:49,490 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:46:49,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:46:49,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1884913910, now seen corresponding path program 409 times [2021-06-12 19:46:49,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:46:49,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172152779] [2021-06-12 19:46:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:46:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:46:49,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:46:49,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172152779] [2021-06-12 19:46:49,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172152779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:46:49,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819629766] [2021-06-12 19:46:49,609 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 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 [2021-06-12 19:46:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:46:49,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:46:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:46:50,076 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:46:50,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:46:50,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:46:50,708 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 299 [2021-06-12 19:46:50,873 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 308 [2021-06-12 19:46:51,058 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-06-12 19:46:51,256 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-06-12 19:46:51,483 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 340 [2021-06-12 19:46:51,650 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 429 [2021-06-12 19:46:51,785 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 249 [2021-06-12 19:46:51,927 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 179 [2021-06-12 19:46:52,375 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 200 [2021-06-12 19:46:52,553 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 174 [2021-06-12 19:46:52,873 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 252 [2021-06-12 19:46:53,268 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 432 [2021-06-12 19:46:53,742 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 382 [2021-06-12 19:46:54,102 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 264 [2021-06-12 19:46:54,815 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 249 [2021-06-12 19:46:55,012 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 339 [2021-06-12 19:46:55,474 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 377 [2021-06-12 19:46:55,917 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 552 [2021-06-12 19:46:56,488 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 332 [2021-06-12 19:46:56,602 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 228 [2021-06-12 19:46:57,726 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 269 [2021-06-12 19:46:57,931 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 312 [2021-06-12 19:46:58,692 WARN L205 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 1029 DAG size of output: 698 [2021-06-12 19:46:59,579 WARN L205 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-06-12 19:47:00,462 WARN L205 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-06-12 19:47:01,422 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 1311 DAG size of output: 854 [2021-06-12 19:47:01,976 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 856 DAG size of output: 874 [2021-06-12 19:47:02,857 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 795 [2021-06-12 19:47:03,685 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 356 [2021-06-12 19:47:03,933 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-06-12 19:47:04,173 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-06-12 19:47:04,441 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 826 DAG size of output: 416 [2021-06-12 19:47:04,714 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 503 [2021-06-12 19:47:05,013 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 363 [2021-06-12 19:47:05,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:47:06,256 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-12 19:47:06,257 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-12 19:47:06,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-12 19:47:07,072 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 244 [2021-06-12 19:47:07,658 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 253 [2021-06-12 19:47:08,135 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 187 [2021-06-12 19:47:08,369 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 366 [2021-06-12 19:47:08,673 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 405 [2021-06-12 19:47:08,810 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 249 [2021-06-12 19:47:09,375 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 236 [2021-06-12 19:47:09,529 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 258 [2021-06-12 19:47:09,648 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 226 [2021-06-12 19:47:10,315 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-06-12 19:47:10,664 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 422 [2021-06-12 19:47:11,274 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 600 [2021-06-12 19:47:12,001 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-06-12 19:47:12,728 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-06-12 19:47:13,522 WARN L205 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 896 DAG size of output: 601 [2021-06-12 19:47:14,404 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 829 [2021-06-12 19:47:15,295 WARN L205 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 731 [2021-06-12 19:47:15,838 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 252 [2021-06-12 19:47:16,292 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 219 [2021-06-12 19:47:16,415 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 270 [2021-06-12 19:47:16,891 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 516 [2021-06-12 19:47:17,406 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 209 [2021-06-12 19:47:17,985 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-06-12 19:47:18,212 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-06-12 19:47:18,473 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 780 DAG size of output: 300 [2021-06-12 19:47:19,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:47:19,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:47:19,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:47:19,397 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:47:19,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:47:19,398 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-12 19:47:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:19,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819629766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:19,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:47:19,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 19:47:19,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155780451] [2021-06-12 19:47:19,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:47:19,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:47:19,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:47:19,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:47:19,431 INFO L87 Difference]: Start difference. First operand 3030 states and 9100 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:47:20,038 INFO L93 Difference]: Finished difference Result 3170 states and 9379 transitions. [2021-06-12 19:47:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:47:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:47:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:47:20,042 INFO L225 Difference]: With dead ends: 3170 [2021-06-12 19:47:20,042 INFO L226 Difference]: Without dead ends: 3151 [2021-06-12 19:47:20,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:47:20,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-12 19:47:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 3027. [2021-06-12 19:47:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3026 states have (on average 3.0023132848645075) internal successors, (9085), 3026 states have internal predecessors, (9085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 9085 transitions. [2021-06-12 19:47:20,074 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 9085 transitions. Word has length 22 [2021-06-12 19:47:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:47:20,074 INFO L482 AbstractCegarLoop]: Abstraction has 3027 states and 9085 transitions. [2021-06-12 19:47:20,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 9085 transitions. [2021-06-12 19:47:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:47:20,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:47:20,076 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:47:20,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44029 [2021-06-12 19:47:20,277 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:47:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:47:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1033769778, now seen corresponding path program 410 times [2021-06-12 19:47:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:47:20,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476246322] [2021-06-12 19:47:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:47:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:47:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:20,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:47:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476246322] [2021-06-12 19:47:20,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476246322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936131015] [2021-06-12 19:47:20,390 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 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 [2021-06-12 19:47:20,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:47:20,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:47:20,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:47:20,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:47:20,852 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:47:20,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:47:20,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:47:21,568 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-06-12 19:47:21,696 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-06-12 19:47:21,834 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 263 [2021-06-12 19:47:22,131 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 295 [2021-06-12 19:47:22,299 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 177 [2021-06-12 19:47:22,908 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 216 [2021-06-12 19:47:23,500 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 289 [2021-06-12 19:47:23,799 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 334 [2021-06-12 19:47:24,736 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 256 [2021-06-12 19:47:25,494 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 355 [2021-06-12 19:47:25,895 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 483 [2021-06-12 19:47:26,370 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 486 [2021-06-12 19:47:27,265 WARN L205 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-06-12 19:47:28,175 WARN L205 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-06-12 19:47:29,178 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 668 [2021-06-12 19:47:29,378 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 697 [2021-06-12 19:47:30,371 WARN L205 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 766 [2021-06-12 19:47:30,766 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 323 [2021-06-12 19:47:31,317 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-06-12 19:47:31,594 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-06-12 19:47:31,883 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 394 [2021-06-12 19:47:32,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:47:33,109 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-12 19:47:33,109 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-12 19:47:33,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-12 19:47:33,738 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 240 [2021-06-12 19:47:33,866 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-06-12 19:47:34,005 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-06-12 19:47:34,159 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 268 [2021-06-12 19:47:34,440 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 360 [2021-06-12 19:47:34,604 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 246 [2021-06-12 19:47:35,244 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-06-12 19:47:35,401 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-06-12 19:47:35,566 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 297 [2021-06-12 19:47:35,786 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 347 [2021-06-12 19:47:36,958 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 213 [2021-06-12 19:47:37,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:47:37,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:47:37,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:47:37,511 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:47:37,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:47:37,512 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-12 19:47:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:37,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936131015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:37,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:47:37,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 19:47:37,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792930368] [2021-06-12 19:47:37,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:47:37,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:47:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:47:37,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:47:37,540 INFO L87 Difference]: Start difference. First operand 3027 states and 9085 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:47:37,996 INFO L93 Difference]: Finished difference Result 3114 states and 9269 transitions. [2021-06-12 19:47:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:47:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:47:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:47:37,999 INFO L225 Difference]: With dead ends: 3114 [2021-06-12 19:47:37,999 INFO L226 Difference]: Without dead ends: 3104 [2021-06-12 19:47:38,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:47:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-12 19:47:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-06-12 19:47:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.0023109937273027) internal successors, (9094), 3029 states have internal predecessors, (9094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9094 transitions. [2021-06-12 19:47:38,033 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9094 transitions. Word has length 22 [2021-06-12 19:47:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:47:38,033 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9094 transitions. [2021-06-12 19:47:38,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9094 transitions. [2021-06-12 19:47:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:47:38,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:47:38,036 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:47:38,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45381 [2021-06-12 19:47:38,252 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:47:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:47:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1113853020, now seen corresponding path program 411 times [2021-06-12 19:47:38,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:47:38,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381735175] [2021-06-12 19:47:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:47:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:47:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:38,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:47:38,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381735175] [2021-06-12 19:47:38,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381735175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:38,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024677239] [2021-06-12 19:47:38,369 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 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 [2021-06-12 19:47:38,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:47:38,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:47:38,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:47:38,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:47:38,906 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:47:38,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:47:38,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:47:39,621 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 229 [2021-06-12 19:47:40,269 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 212 [2021-06-12 19:47:40,375 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 214 [2021-06-12 19:47:41,263 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 272 [2021-06-12 19:47:41,431 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 279 [2021-06-12 19:47:41,742 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-06-12 19:47:42,066 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-06-12 19:47:42,416 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 623 DAG size of output: 416 [2021-06-12 19:47:42,587 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 386 [2021-06-12 19:47:43,057 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-06-12 19:47:43,181 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-06-12 19:47:43,421 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 306 [2021-06-12 19:47:44,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:47:44,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:47:44,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:47:44,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-12 19:47:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:44,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024677239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:44,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:47:44,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 19:47:44,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127088346] [2021-06-12 19:47:44,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:47:44,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:47:44,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:47:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:47:44,301 INFO L87 Difference]: Start difference. First operand 3030 states and 9094 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:47:44,675 INFO L93 Difference]: Finished difference Result 3173 states and 9458 transitions. [2021-06-12 19:47:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:47:44,675 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:47:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:47:44,679 INFO L225 Difference]: With dead ends: 3173 [2021-06-12 19:47:44,679 INFO L226 Difference]: Without dead ends: 3157 [2021-06-12 19:47:44,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 449.0ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:47:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-06-12 19:47:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3081. [2021-06-12 19:47:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.0107142857142857) internal successors, (9273), 3080 states have internal predecessors, (9273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:44,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 9273 transitions. [2021-06-12 19:47:44,714 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 9273 transitions. Word has length 22 [2021-06-12 19:47:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:47:44,714 INFO L482 AbstractCegarLoop]: Abstraction has 3081 states and 9273 transitions. [2021-06-12 19:47:44,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:47:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 9273 transitions. [2021-06-12 19:47:44,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:47:44,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:47:44,717 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:47:44,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46366,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:47:44,917 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:47:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:47:44,918 INFO L82 PathProgramCache]: Analyzing trace with hash -370269660, now seen corresponding path program 412 times [2021-06-12 19:47:44,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:47:44,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712007133] [2021-06-12 19:47:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:47:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:47:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:47:45,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:47:45,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712007133] [2021-06-12 19:47:45,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712007133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:47:45,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545529943] [2021-06-12 19:47:45,031 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 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 [2021-06-12 19:47:45,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:47:45,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:47:45,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:47:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:47:45,487 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:47:45,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:47:45,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:47:46,380 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 239 [2021-06-12 19:47:46,483 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 247 [2021-06-12 19:47:46,692 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-06-12 19:47:46,903 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-06-12 19:47:47,164 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 370 [2021-06-12 19:47:47,447 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 391 [2021-06-12 19:47:47,575 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 268 [2021-06-12 19:47:48,258 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 345 [2021-06-12 19:47:48,805 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 312 [2021-06-12 19:47:49,281 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 260 [2021-06-12 19:47:49,512 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-12 19:47:49,758 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-12 19:47:50,022 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 314 [2021-06-12 19:47:50,281 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 348 [2021-06-12 19:47:50,418 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 219 [2021-06-12 19:47:50,975 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 235 [2021-06-12 19:47:51,515 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 252 [2021-06-12 19:47:51,628 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 218 [2021-06-12 19:47:52,039 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 266 [2021-06-12 19:47:52,203 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-06-12 19:47:52,371 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-06-12 19:47:52,584 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 371 [2021-06-12 19:47:52,994 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 468 [2021-06-12 19:47:53,251 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 300 [2021-06-12 19:47:53,791 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 337 [2021-06-12 19:47:53,975 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 344 [2021-06-12 19:47:54,941 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 248 [2021-06-12 19:47:55,262 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 369 [2021-06-12 19:47:55,595 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 748 DAG size of output: 369 [2021-06-12 19:47:55,937 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 373 [2021-06-12 19:47:56,082 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 289 [2021-06-12 19:47:56,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:47:56,855 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-12 19:47:56,855 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-12 19:47:56,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-12 19:47:57,686 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 286 [2021-06-12 19:47:57,845 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 300 [2021-06-12 19:47:57,997 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 304 [2021-06-12 19:47:58,148 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 304 [2021-06-12 19:47:58,336 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 314 [2021-06-12 19:47:58,466 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 318 [2021-06-12 19:47:58,765 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 404 [2021-06-12 19:47:59,056 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 295 [2021-06-12 19:48:00,489 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 257 [2021-06-12 19:48:00,743 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 370 [2021-06-12 19:48:01,116 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 548 DAG size of output: 440 [2021-06-12 19:48:01,345 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 328 [2021-06-12 19:48:01,642 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 292 [2021-06-12 19:48:02,208 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 246 [2021-06-12 19:48:02,760 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 356 [2021-06-12 19:48:03,093 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 456 [2021-06-12 19:48:04,018 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 540 [2021-06-12 19:48:04,828 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 1074 DAG size of output: 737 [2021-06-12 19:48:05,684 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 1131 DAG size of output: 782 [2021-06-12 19:48:06,683 WARN L205 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 1150 DAG size of output: 798 [2021-06-12 19:48:07,691 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 1150 DAG size of output: 798 [2021-06-12 19:48:08,785 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1156 DAG size of output: 796 [2021-06-12 19:48:09,434 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 798 DAG size of output: 531 [2021-06-12 19:48:09,944 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 531 [2021-06-12 19:48:10,148 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 314 [2021-06-12 19:48:11,215 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 250 [2021-06-12 19:48:11,438 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 343 [2021-06-12 19:48:11,683 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 382 [2021-06-12 19:48:11,924 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 382 [2021-06-12 19:48:12,271 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 386 [2021-06-12 19:48:12,483 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 387 [2021-06-12 19:48:12,728 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 439 [2021-06-12 19:48:13,491 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 254 [2021-06-12 19:48:13,633 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 306 [2021-06-12 19:48:13,808 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 309 [2021-06-12 19:48:13,983 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 309 [2021-06-12 19:48:14,283 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 306 [2021-06-12 19:48:14,539 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 359 [2021-06-12 19:48:14,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:48:14,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:48:14,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:48:14,970 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:48:14,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:48:14,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-12 19:48:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:15,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545529943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:15,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:15,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 19:48:15,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653848780] [2021-06-12 19:48:15,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:48:15,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:48:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:48:15,001 INFO L87 Difference]: Start difference. First operand 3081 states and 9273 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:15,741 INFO L93 Difference]: Finished difference Result 3278 states and 9699 transitions. [2021-06-12 19:48:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:48:15,741 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:48:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:15,745 INFO L225 Difference]: With dead ends: 3278 [2021-06-12 19:48:15,745 INFO L226 Difference]: Without dead ends: 3252 [2021-06-12 19:48:15,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 555.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:48:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-06-12 19:48:15,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 3085. [2021-06-12 19:48:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.0103761348897535) internal successors, (9284), 3084 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 9284 transitions. [2021-06-12 19:48:15,784 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 9284 transitions. Word has length 22 [2021-06-12 19:48:15,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:15,784 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 9284 transitions. [2021-06-12 19:48:15,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 9284 transitions. [2021-06-12 19:48:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:48:15,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:15,787 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:15,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46810 [2021-06-12 19:48:15,987 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:48:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:15,987 INFO L82 PathProgramCache]: Analyzing trace with hash 480874472, now seen corresponding path program 413 times [2021-06-12 19:48:15,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:15,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529415243] [2021-06-12 19:48:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:16,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:16,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529415243] [2021-06-12 19:48:16,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529415243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:16,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506957541] [2021-06-12 19:48:16,096 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 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 [2021-06-12 19:48:16,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:48:16,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:16,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:48:16,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:16,553 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:48:16,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:48:16,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:48:17,417 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 315 [2021-06-12 19:48:17,568 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 315 [2021-06-12 19:48:17,736 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 328 [2021-06-12 19:48:17,897 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 401 [2021-06-12 19:48:18,662 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 252 [2021-06-12 19:48:18,838 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-12 19:48:19,000 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-12 19:48:19,187 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 320 [2021-06-12 19:48:20,643 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 219 [2021-06-12 19:48:21,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:48:21,447 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-12 19:48:21,447 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-12 19:48:21,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-12 19:48:22,188 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 264 [2021-06-12 19:48:22,308 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 264 [2021-06-12 19:48:22,454 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 257 [2021-06-12 19:48:22,620 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 307 [2021-06-12 19:48:22,879 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 299 [2021-06-12 19:48:23,535 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 322 [2021-06-12 19:48:23,738 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 339 [2021-06-12 19:48:23,893 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 206 [2021-06-12 19:48:24,599 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 251 [2021-06-12 19:48:25,006 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 474 [2021-06-12 19:48:25,421 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 474 [2021-06-12 19:48:25,926 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 483 [2021-06-12 19:48:26,920 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 362 [2021-06-12 19:48:27,840 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 250 [2021-06-12 19:48:27,997 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 257 [2021-06-12 19:48:28,200 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 290 [2021-06-12 19:48:28,529 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 378 [2021-06-12 19:48:28,854 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 378 [2021-06-12 19:48:29,367 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 426 [2021-06-12 19:48:29,689 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 439 [2021-06-12 19:48:30,640 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 226 [2021-06-12 19:48:30,748 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 226 [2021-06-12 19:48:30,869 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 221 [2021-06-12 19:48:31,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:48:31,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:48:31,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:48:31,119 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:48:31,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:48:31,119 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-12 19:48:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:31,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506957541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:31,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:48:31,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 19:48:31,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870268861] [2021-06-12 19:48:31,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:48:31,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:48:31,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:48:31,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:48:31,148 INFO L87 Difference]: Start difference. First operand 3085 states and 9284 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:48:31,594 INFO L93 Difference]: Finished difference Result 3177 states and 9485 transitions. [2021-06-12 19:48:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:48:31,594 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:48:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:48:31,597 INFO L225 Difference]: With dead ends: 3177 [2021-06-12 19:48:31,597 INFO L226 Difference]: Without dead ends: 3167 [2021-06-12 19:48:31,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 500.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:48:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-06-12 19:48:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3091. [2021-06-12 19:48:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 3.010355987055016) internal successors, (9302), 3090 states have internal predecessors, (9302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 9302 transitions. [2021-06-12 19:48:31,629 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 9302 transitions. Word has length 22 [2021-06-12 19:48:31,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:48:31,629 INFO L482 AbstractCegarLoop]: Abstraction has 3091 states and 9302 transitions. [2021-06-12 19:48:31,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:48:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 9302 transitions. [2021-06-12 19:48:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:48:31,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:48:31,632 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:48:31,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48443,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:48:31,833 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:48:31,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:48:31,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1096538788, now seen corresponding path program 414 times [2021-06-12 19:48:31,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:48:31,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159423431] [2021-06-12 19:48:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:48:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:48:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:48:31,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:48:31,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159423431] [2021-06-12 19:48:31,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159423431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:48:31,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918273497] [2021-06-12 19:48:31,943 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 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 [2021-06-12 19:48:31,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:48:31,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:48:31,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:48:31,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:48:32,409 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:48:32,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:48:32,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:48:32,988 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 343 [2021-06-12 19:48:33,120 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 350 [2021-06-12 19:48:33,279 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 362 [2021-06-12 19:48:34,028 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 505 [2021-06-12 19:48:34,324 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 505 [2021-06-12 19:48:34,669 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 518 [2021-06-12 19:48:35,362 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 749 [2021-06-12 19:48:35,470 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 495 [2021-06-12 19:48:35,672 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 384 [2021-06-12 19:48:35,938 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 331 [2021-06-12 19:48:36,811 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 290 [2021-06-12 19:48:37,103 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 351 [2021-06-12 19:48:37,997 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 335 [2021-06-12 19:48:38,361 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 764 DAG size of output: 417 [2021-06-12 19:48:39,385 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 284 [2021-06-12 19:48:39,558 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 323 [2021-06-12 19:48:39,819 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 346 [2021-06-12 19:48:40,494 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 1065 DAG size of output: 648 [2021-06-12 19:48:41,404 WARN L205 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 729 [2021-06-12 19:48:42,328 WARN L205 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 729 [2021-06-12 19:48:43,308 WARN L205 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 1358 DAG size of output: 735 [2021-06-12 19:48:43,617 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 735 DAG size of output: 530 [2021-06-12 19:48:43,896 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 369 [2021-06-12 19:48:44,627 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 300 [2021-06-12 19:48:45,298 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 273 [2021-06-12 19:48:45,576 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 516 [2021-06-12 19:48:45,846 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 516 [2021-06-12 19:48:46,151 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 519 [2021-06-12 19:48:46,362 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 575 [2021-06-12 19:48:46,722 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 374 [2021-06-12 19:48:47,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:48:47,522 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-12 19:48:47,522 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-12 19:48:47,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-12 19:48:48,114 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 249 [2021-06-12 19:48:48,763 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 252 [2021-06-12 19:48:49,007 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 366 [2021-06-12 19:48:49,255 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 366 [2021-06-12 19:48:49,561 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 375 [2021-06-12 19:48:49,923 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 420 [2021-06-12 19:48:50,178 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 383 [2021-06-12 19:48:50,603 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 419 [2021-06-12 19:48:50,995 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 410 [2021-06-12 19:48:51,246 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 233 [2021-06-12 19:48:51,901 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 173 [2021-06-12 19:48:52,016 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 186 [2021-06-12 19:48:52,196 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 227 [2021-06-12 19:48:52,304 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 219 [2021-06-12 19:48:52,799 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 202 [2021-06-12 19:48:53,180 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 240 [2021-06-12 19:48:53,603 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 354 [2021-06-12 19:48:54,141 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 417 [2021-06-12 19:48:54,772 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 438 [2021-06-12 19:48:55,160 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 411 [2021-06-12 19:48:55,535 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 402 [2021-06-12 19:48:55,959 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 367 [2021-06-12 19:48:56,804 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 194 [2021-06-12 19:48:57,007 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 261 [2021-06-12 19:48:57,862 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 328 [2021-06-12 19:48:58,308 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 391 [2021-06-12 19:48:58,831 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 412 [2021-06-12 19:48:59,927 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 795 DAG size of output: 621 [2021-06-12 19:49:00,201 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 402 [2021-06-12 19:49:00,642 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 438 [2021-06-12 19:49:01,055 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 429 [2021-06-12 19:49:01,998 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 285 [2021-06-12 19:49:02,226 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 324 [2021-06-12 19:49:02,476 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 309 [2021-06-12 19:49:02,713 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 249 [2021-06-12 19:49:02,883 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 241 [2021-06-12 19:49:03,312 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 241 [2021-06-12 19:49:03,786 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 260 [2021-06-12 19:49:03,958 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 269 [2021-06-12 19:49:04,181 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 277 [2021-06-12 19:49:04,446 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 308 [2021-06-12 19:49:04,819 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 350 [2021-06-12 19:49:05,499 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 675 DAG size of output: 506 [2021-06-12 19:49:06,351 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 759 DAG size of output: 579 [2021-06-12 19:49:07,343 WARN L205 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 602 [2021-06-12 19:49:07,738 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 426 [2021-06-12 19:49:08,136 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 417 [2021-06-12 19:49:08,566 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 378 [2021-06-12 19:49:08,938 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 385 [2021-06-12 19:49:09,838 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 216 [2021-06-12 19:49:10,045 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 290 [2021-06-12 19:49:10,503 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 458 [2021-06-12 19:49:10,970 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 211 [2021-06-12 19:49:11,085 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 198 [2021-06-12 19:49:11,568 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 226 [2021-06-12 19:49:11,712 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 236 [2021-06-12 19:49:12,013 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 340 [2021-06-12 19:49:12,637 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 713 DAG size of output: 517 [2021-06-12 19:49:13,427 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 593 [2021-06-12 19:49:14,342 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 616 [2021-06-12 19:49:16,246 WARN L205 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 1211 DAG size of output: 855 [2021-06-12 19:49:19,614 WARN L205 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 1594 DAG size of output: 1219 [2021-06-12 19:49:22,992 WARN L205 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 1594 DAG size of output: 1219 [2021-06-12 19:49:26,900 WARN L205 SmtUtils]: Spent 3.90 s on a formula simplification. DAG size of input: 1603 DAG size of output: 1222 [2021-06-12 19:49:27,053 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 1217 [2021-06-12 19:49:28,488 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 1219 DAG size of output: 709 [2021-06-12 19:49:29,191 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 597 [2021-06-12 19:49:31,421 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 201 [2021-06-12 19:49:31,598 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 247 [2021-06-12 19:49:31,934 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 327 [2021-06-12 19:49:32,414 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 417 [2021-06-12 19:49:32,888 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 417 [2021-06-12 19:49:33,181 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 288 [2021-06-12 19:49:33,979 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 227 [2021-06-12 19:49:34,090 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 227 [2021-06-12 19:49:34,216 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 230 [2021-06-12 19:49:34,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:49:34,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:49:34,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:49:34,530 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:49:34,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:49:34,530 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-12 19:49:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:34,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918273497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:34,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:34,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 19:49:34,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649875359] [2021-06-12 19:49:34,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:49:34,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:49:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:49:34,559 INFO L87 Difference]: Start difference. First operand 3091 states and 9302 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:35,022 INFO L93 Difference]: Finished difference Result 3203 states and 9543 transitions. [2021-06-12 19:49:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:49:35,023 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:49:35,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:35,026 INFO L225 Difference]: With dead ends: 3203 [2021-06-12 19:49:35,026 INFO L226 Difference]: Without dead ends: 3193 [2021-06-12 19:49:35,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 514.8ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:49:35,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-06-12 19:49:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 3091. [2021-06-12 19:49:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 3.010355987055016) internal successors, (9302), 3090 states have internal predecessors, (9302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 9302 transitions. [2021-06-12 19:49:35,058 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 9302 transitions. Word has length 22 [2021-06-12 19:49:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:35,058 INFO L482 AbstractCegarLoop]: Abstraction has 3091 states and 9302 transitions. [2021-06-12 19:49:35,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 9302 transitions. [2021-06-12 19:49:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:49:35,060 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:35,060 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:35,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49540,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:35,261 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:49:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash -227504460, now seen corresponding path program 415 times [2021-06-12 19:49:35,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:35,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344006221] [2021-06-12 19:49:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:49:35,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:35,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344006221] [2021-06-12 19:49:35,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344006221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:35,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407943642] [2021-06-12 19:49:35,350 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 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 [2021-06-12 19:49:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:35,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:49:35,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:35,799 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:49:35,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:49:35,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:49:36,646 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 261 [2021-06-12 19:49:36,772 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 261 [2021-06-12 19:49:36,938 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 270 [2021-06-12 19:49:37,103 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 306 [2021-06-12 19:49:37,792 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 283 [2021-06-12 19:49:38,260 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 280 [2021-06-12 19:49:38,532 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 442 [2021-06-12 19:49:38,803 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 442 [2021-06-12 19:49:39,129 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 451 [2021-06-12 19:49:39,527 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 406 [2021-06-12 19:49:39,759 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 339 [2021-06-12 19:49:39,886 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 267 [2021-06-12 19:49:40,556 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 289 [2021-06-12 19:49:40,768 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 321 [2021-06-12 19:49:41,008 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 321 [2021-06-12 19:49:41,246 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 328 [2021-06-12 19:49:41,422 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 328 [2021-06-12 19:49:41,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:49:41,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:49:41,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:49:41,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-12 19:49:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:49:41,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407943642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:41,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:49:41,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-12 19:49:41,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727764259] [2021-06-12 19:49:41,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 19:49:41,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:49:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 19:49:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:49:41,927 INFO L87 Difference]: Start difference. First operand 3091 states and 9302 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:49:42,152 INFO L93 Difference]: Finished difference Result 3122 states and 9346 transitions. [2021-06-12 19:49:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:49:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:49:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:49:42,155 INFO L225 Difference]: With dead ends: 3122 [2021-06-12 19:49:42,155 INFO L226 Difference]: Without dead ends: 3104 [2021-06-12 19:49:42,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 380.7ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:49:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-12 19:49:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3091. [2021-06-12 19:49:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 3.0093851132686082) internal successors, (9299), 3090 states have internal predecessors, (9299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 9299 transitions. [2021-06-12 19:49:42,188 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 9299 transitions. Word has length 22 [2021-06-12 19:49:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:49:42,188 INFO L482 AbstractCegarLoop]: Abstraction has 3091 states and 9299 transitions. [2021-06-12 19:49:42,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:49:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 9299 transitions. [2021-06-12 19:49:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:49:42,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:49:42,191 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:49:42,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51755,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:49:42,391 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:49:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:49:42,391 INFO L82 PathProgramCache]: Analyzing trace with hash 158696654, now seen corresponding path program 416 times [2021-06-12 19:49:42,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:49:42,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719198938] [2021-06-12 19:49:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:49:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:49:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:49:42,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:49:42,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719198938] [2021-06-12 19:49:42,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719198938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:49:42,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87874887] [2021-06-12 19:49:42,489 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 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 [2021-06-12 19:49:42,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:49:42,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:49:42,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:49:42,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:49:42,936 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:49:42,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:49:42,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:49:44,172 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 295 [2021-06-12 19:49:44,450 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 456 [2021-06-12 19:49:44,750 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 456 [2021-06-12 19:49:45,068 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 464 [2021-06-12 19:49:45,352 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 470 [2021-06-12 19:49:45,637 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 486 [2021-06-12 19:49:46,333 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 276 [2021-06-12 19:49:46,944 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 253 [2021-06-12 19:49:47,412 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 356 [2021-06-12 19:49:47,741 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 714 DAG size of output: 554 [2021-06-12 19:49:48,172 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 766 DAG size of output: 604 [2021-06-12 19:49:48,684 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 610 [2021-06-12 19:49:49,180 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 610 [2021-06-12 19:49:49,736 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 784 DAG size of output: 614 [2021-06-12 19:49:50,325 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 585 [2021-06-12 19:49:50,521 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 338 [2021-06-12 19:49:50,640 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 254 [2021-06-12 19:49:51,314 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 363 [2021-06-12 19:49:51,626 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 308 [2021-06-12 19:49:52,025 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 260 [2021-06-12 19:49:52,158 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 260 [2021-06-12 19:49:52,301 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 265 [2021-06-12 19:49:53,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:49:53,389 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-12 19:49:53,389 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-12 19:49:53,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-12 19:49:54,030 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 176 [2021-06-12 19:49:55,040 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 218 [2021-06-12 19:49:55,203 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 229 [2021-06-12 19:49:55,436 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 293 [2021-06-12 19:49:55,718 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 302 [2021-06-12 19:49:56,061 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 307 [2021-06-12 19:49:56,477 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 329 [2021-06-12 19:49:56,885 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 329 [2021-06-12 19:49:57,335 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 332 [2021-06-12 19:49:57,820 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 410 [2021-06-12 19:49:58,079 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 292 [2021-06-12 19:49:58,233 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 233 [2021-06-12 19:49:58,436 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 268 [2021-06-12 19:49:59,161 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 258 [2021-06-12 19:49:59,329 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 258 [2021-06-12 19:49:59,527 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 266 [2021-06-12 19:50:00,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:50:00,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:50:00,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:00,137 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 19:50:00,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:00,138 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-12 19:50:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:00,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87874887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:00,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:00,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-12 19:50:00,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468519052] [2021-06-12 19:50:00,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 19:50:00,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:00,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 19:50:00,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:50:00,165 INFO L87 Difference]: Start difference. First operand 3091 states and 9299 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:00,525 INFO L93 Difference]: Finished difference Result 3246 states and 9616 transitions. [2021-06-12 19:50:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:50:00,526 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 19:50:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:00,529 INFO L225 Difference]: With dead ends: 3246 [2021-06-12 19:50:00,530 INFO L226 Difference]: Without dead ends: 3236 [2021-06-12 19:50:00,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:50:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-12 19:50:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3089. [2021-06-12 19:50:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3088 states have (on average 3.0093911917098444) internal successors, (9293), 3088 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 9293 transitions. [2021-06-12 19:50:00,567 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 9293 transitions. Word has length 22 [2021-06-12 19:50:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:00,567 INFO L482 AbstractCegarLoop]: Abstraction has 3089 states and 9293 transitions. [2021-06-12 19:50:00,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:00,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 9293 transitions. [2021-06-12 19:50:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 19:50:00,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:00,570 INFO L472 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:00,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52179,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:00,770 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:00,770 INFO L82 PathProgramCache]: Analyzing trace with hash 696552232, now seen corresponding path program 417 times [2021-06-12 19:50:00,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:00,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994956553] [2021-06-12 19:50:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:00,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:00,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994956553] [2021-06-12 19:50:00,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994956553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:00,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084996891] [2021-06-12 19:50:00,880 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 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 [2021-06-12 19:50:00,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:50:00,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:00,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 19:50:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:01,338 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 19:50:01,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:50:01,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-12 19:50:02,073 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 287 [2021-06-12 19:50:02,222 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 287 [2021-06-12 19:50:02,370 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 300 [2021-06-12 19:50:02,527 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 360 [2021-06-12 19:50:02,639 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 197 [2021-06-12 19:50:03,546 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 376 [2021-06-12 19:50:03,793 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 376 [2021-06-12 19:50:04,051 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 382 [2021-06-12 19:50:04,323 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 346 [2021-06-12 19:50:05,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:05,648 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-12 19:50:05,649 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-12 19:50:05,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-12 19:50:06,404 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 255 [2021-06-12 19:50:06,920 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 207 [2021-06-12 19:50:07,129 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 251 [2021-06-12 19:50:07,259 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 264 [2021-06-12 19:50:07,547 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 374 [2021-06-12 19:50:07,825 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 374 [2021-06-12 19:50:08,190 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 609 DAG size of output: 385 [2021-06-12 19:50:08,786 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 444 [2021-06-12 19:50:09,455 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 470 [2021-06-12 19:50:09,903 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 408 [2021-06-12 19:50:10,106 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 215 [2021-06-12 19:50:11,242 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 240 [2021-06-12 19:50:11,394 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 269 [2021-06-12 19:50:11,590 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 224 [2021-06-12 19:50:12,019 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 216 [2021-06-12 19:50:12,698 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 235 [2021-06-12 19:50:12,857 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 279 [2021-06-12 19:50:13,204 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 422 [2021-06-12 19:50:13,886 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 758 DAG size of output: 620 [2021-06-12 19:50:14,470 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 421 [2021-06-12 19:50:15,407 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 216 [2021-06-12 19:50:15,827 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 231 [2021-06-12 19:50:16,438 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 241 [2021-06-12 19:50:16,686 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 358 [2021-06-12 19:50:17,241 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 554 [2021-06-12 19:50:18,699 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 1192 DAG size of output: 946 [2021-06-12 19:50:19,297 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 463 [2021-06-12 19:50:19,666 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 393 [2021-06-12 19:50:19,977 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 195 [2021-06-12 19:50:21,087 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 292 [2021-06-12 19:50:21,322 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 365 [2021-06-12 19:50:21,619 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 374 [2021-06-12 19:50:22,698 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 266 [2021-06-12 19:50:22,909 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 323 [2021-06-12 19:50:23,163 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 333 [2021-06-12 19:50:23,849 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 543 [2021-06-12 19:50:24,888 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 847 DAG size of output: 722 [2021-06-12 19:50:25,309 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 428 [2021-06-12 19:50:25,720 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 354 [2021-06-12 19:50:26,043 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 380 [2021-06-12 19:50:26,213 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 285 [2021-06-12 19:50:26,710 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 303 [2021-06-12 19:50:27,704 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 339 [2021-06-12 19:50:28,003 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 397 [2021-06-12 19:50:28,113 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 224 [2021-06-12 19:50:28,799 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 241 [2021-06-12 19:50:29,323 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 520 [2021-06-12 19:50:30,169 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 836 DAG size of output: 703 [2021-06-12 19:50:32,110 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 1456 DAG size of output: 1110 Received shutdown request... [2021-06-12 19:50:36,035 WARN L205 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 2154 DAG size of output: 1735 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown